The Uterine ( Menstrual) Cycleaudio
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The document summarizes the uterine (menstrual) cycle. It describes the three phases: menstruation where the endometrium breaks down, the proliferative phase where the endometrium grows under estrogen stimulation, and the secretory phase where progesterone stimulates uterine gland secretion. It also outlines the roles of the hypothalamus, pituitary gland, ovaries, estrogen, and progesterone in regulating the cycle. If fertilization does not occur, the corpus luteum degenerates and stops producing hormones, causing menstruation and restarting the cycle.
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C.1 menstrual cycle
The menstrual cycle is controlled by hormones from the pituitary gland and ovaries. It aims to release an egg once a month to allow for potential fertilization and pregnancy. The cycle involves three phases - the menstrual, proliferative, and secretory phases. Estrogen stimulates growth of the uterine lining during the proliferative phase, while progesterone maintains the lining during the secretory phase in preparation for potential implantation. If implantation does not occur, progesterone and estrogen levels fall, causing the uterine lining to shed and result in menstruation, restarting the cycle.
The menstrual cycle- Mr. panneh
this lecture was presented to the December 2016 Midwifery class of the school for Enrolled Nurses and Midwives- The Gambia.
Menstrual cycle
The menstrual cycle involves two main phases - the follicular phase and luteal phase. In the follicular phase, hormones stimulate the growth of follicles in the ovaries and thickening of the uterine lining. This culminates in a surge of LH which causes ovulation of an egg. In the luteal phase, the corpus luteum forms and produces progesterone and estrogen to prepare the uterus for potential implantation. If implantation does not occur, hormone levels fall and menstruation begins, restarting the cycle.
Menstrual cycle regulation
The menstrual cycle is regulated by hormones from the hypothalamus, pituitary gland, and ovaries. It involves both the ovarian cycle and uterine cycle. The ovarian cycle consists of the follicular phase leading up to ovulation on day 14, and the luteal phase after. The uterine cycle involves the menstrual, proliferative, and secretory phases. Hormones like FSH, LH, estrogen, and progesterone are involved in a feedback loop to regulate the cycle. Disorders of the menstrual cycle can cause problems like painful periods or abnormal bleeding.
Chapter 17 Reproduction in Humans Lesson 2 - The Menstrual Cycle
The document summarizes the key events of the human menstrual cycle. It describes how follicles in the ovaries mature and how hormones regulate the cycle. It explains that the ovarian follicle ruptures and releases an egg (ovulation) around day 14. If the egg is not fertilized, hormone levels drop and the uterine lining is shed through menstruation around day 28, starting a new cycle. Oral contraceptives work by inhibiting the hormones FSH and LH to prevent ovulation and therefore pregnancy.
The ovarian cycle
The menstrual cycle is governed by hormonal changes and can be divided into the ovarian cycle and uterine cycle. The ovarian cycle consists of the follicular phase where follicles mature, ovulation when an egg is released, and the luteal phase where the corpus luteum forms. The uterine cycle involves menstruation, the proliferative phase where the lining grows, and the secretory phase where the lining thickens in preparation for pregnancy under progesterone influence. These cycles allow for reproduction and are a natural part of female reproductive health.
Physiology of menstruation
Menstruation is a visible manifestation of the cyclic, hormonally-driven shedding of the uterine lining. It results from the interplay of hormones through the hypothalamic-pituitary-ovarian axis. The menstrual cycle consists of two concurrent cycles - the ovarian cycle involving follicular development and ovulation, and the uterine cycle involving proliferation and shedding of the endometrium. The ovarian cycle is regulated by hormones including estrogen, progesterone, FSH and LH which act at different phases to recruit follicles, select a dominant follicle, trigger ovulation, and support luteal function if pregnancy does not occur.
Understanding Menstrual Cycle
The menstrual cycle is a term used to describe monthly events that occur within a woman's body in preparation for the possibility of pregnancy.
Each month, an egg is released from an ovary in a process called ovulation.
At the same time, the lining of the uterus thickens, ready for pregnancy.
If fertilization does not take place, the lining of the uterus is shed in menstrual bleeding and the cycle starts over.
Recommended
C.1 menstrual cycle
The menstrual cycle is controlled by hormones from the pituitary gland and ovaries. It aims to release an egg once a month to allow for potential fertilization and pregnancy. The cycle involves three phases - the menstrual, proliferative, and secretory phases. Estrogen stimulates growth of the uterine lining during the proliferative phase, while progesterone maintains the lining during the secretory phase in preparation for potential implantation. If implantation does not occur, progesterone and estrogen levels fall, causing the uterine lining to shed and result in menstruation, restarting the cycle.
The menstrual cycle- Mr. panneh
this lecture was presented to the December 2016 Midwifery class of the school for Enrolled Nurses and Midwives- The Gambia.
Menstrual cycle
The menstrual cycle involves two main phases - the follicular phase and luteal phase. In the follicular phase, hormones stimulate the growth of follicles in the ovaries and thickening of the uterine lining. This culminates in a surge of LH which causes ovulation of an egg. In the luteal phase, the corpus luteum forms and produces progesterone and estrogen to prepare the uterus for potential implantation. If implantation does not occur, hormone levels fall and menstruation begins, restarting the cycle.
Menstrual cycle regulation
The menstrual cycle is regulated by hormones from the hypothalamus, pituitary gland, and ovaries. It involves both the ovarian cycle and uterine cycle. The ovarian cycle consists of the follicular phase leading up to ovulation on day 14, and the luteal phase after. The uterine cycle involves the menstrual, proliferative, and secretory phases. Hormones like FSH, LH, estrogen, and progesterone are involved in a feedback loop to regulate the cycle. Disorders of the menstrual cycle can cause problems like painful periods or abnormal bleeding.
Chapter 17 Reproduction in Humans Lesson 2 - The Menstrual Cycle
The document summarizes the key events of the human menstrual cycle. It describes how follicles in the ovaries mature and how hormones regulate the cycle. It explains that the ovarian follicle ruptures and releases an egg (ovulation) around day 14. If the egg is not fertilized, hormone levels drop and the uterine lining is shed through menstruation around day 28, starting a new cycle. Oral contraceptives work by inhibiting the hormones FSH and LH to prevent ovulation and therefore pregnancy.
The ovarian cycle
The menstrual cycle is governed by hormonal changes and can be divided into the ovarian cycle and uterine cycle. The ovarian cycle consists of the follicular phase where follicles mature, ovulation when an egg is released, and the luteal phase where the corpus luteum forms. The uterine cycle involves menstruation, the proliferative phase where the lining grows, and the secretory phase where the lining thickens in preparation for pregnancy under progesterone influence. These cycles allow for reproduction and are a natural part of female reproductive health.
Physiology of menstruation
Menstruation is a visible manifestation of the cyclic, hormonally-driven shedding of the uterine lining. It results from the interplay of hormones through the hypothalamic-pituitary-ovarian axis. The menstrual cycle consists of two concurrent cycles - the ovarian cycle involving follicular development and ovulation, and the uterine cycle involving proliferation and shedding of the endometrium. The ovarian cycle is regulated by hormones including estrogen, progesterone, FSH and LH which act at different phases to recruit follicles, select a dominant follicle, trigger ovulation, and support luteal function if pregnancy does not occur.
Understanding Menstrual Cycle
The menstrual cycle is a term used to describe monthly events that occur within a woman's body in preparation for the possibility of pregnancy.
Each month, an egg is released from an ovary in a process called ovulation.
At the same time, the lining of the uterus thickens, ready for pregnancy.
If fertilization does not take place, the lining of the uterus is shed in menstrual bleeding and the cycle starts over.
menstural cycle
The document discusses the hormones released during the menstrual cycle and the steps involved. It describes that the menstrual cycle involves three phases - the menstrual phase, proliferative phase, and secretory phase. The menstrual phase lasts for 4 days and involves shedding of the endometrial lining. The proliferative phase lasts 10 days and involves thickening of the endometrial lining in preparation for implantation. The secretory phase lasts 15-28 days and involves secretion of hormones like progesterone to support implantation if fertilization occurs. Key hormones released during the cycle include FSH, LH, progesterone, and estrogen, which regulate follicle development, ovulation, and uterine lining changes.
Ovarian and menstrual cycle
The document summarizes the female ovarian and menstrual cycle. It discusses the female reproductive organs and hormones involved in the monthly cycle. It describes the process of oogenesis where oogonia develop into oocytes in the ovaries from fetal life until ovulation. In contrast, spermatogenesis is a continual process in males where spermatogonia can produce millions of sperm daily. The cycle is regulated by levels of gonadotropins and hormones, with the corpus luteum developing after ovulation and menstruation occurring when stimulation decreases.
Menstrual cycle ppt nitin
The menstrual cycle is regulated by fluctuating sex hormones from the pituitary gland. It consists of four phases: the follicular phase where follicles in the ovaries mature and estrogen levels rise, ovulation where a mature egg is released, the luteal phase where the corpus luteum produces progesterone, and menstruation where the uterine lining sheds if pregnancy does not occur. The cycle typically lasts around 28 days and involves changes in the ovaries and uterus governed by hormones that prepare the body for potential pregnancy each month.
Menstrual Cycle
1. The menstrual cycle refers to the cyclical changes in the female reproductive system during the reproductive phase. It involves changes in hormone levels, the ovaries, and the uterus.
2. The menstrual cycle consists of three phases - the follicular phase, ovulation, and the luteal phase. It is controlled by hormones from the pituitary gland and ovaries and typically lasts around 28 days.
3. During ovulation, a mature follicle ruptures and releases an egg. If the egg is not fertilized, hormone levels fall and the uterine lining sheds, resulting in menstruation and the start of a new cycle.
The normal menstrual cycle
The normal menstrual cycle involves hormonal signaling between the hypothalamus, pituitary gland, and ovaries. During the follicular phase, FSH causes follicles to mature and produce estrogen in the ovaries. Rising estrogen triggers a LH surge, causing ovulation. After ovulation, the corpus luteum forms and produces progesterone, which prepares the endometrium for potential implantation during the luteal phase. If implantation does not occur, falling progesterone triggers menstruation and shedding of the endometrial lining. This begins a new cycle.
Menstrual cycle
The female reproductive cycle involves cyclical changes in the ovaries and uterus controlled by hormones. Each cycle typically lasts around 28 days and consists of four phases: the menstrual phase where the uterus sheds its lining if ovulation did not occur; the preovulatory phase where a follicle matures and estrogen levels rise; ovulation of the follicle on around day 14; and the postovulatory phase where the corpus luteum forms and secretes progesterone to thicken the uterine lining to prepare for potential implantation if fertilization occurs. If no fertilization, the corpus luteum regresses and menstruation begins, starting a new cycle.
Menstrual cycle
DEFINITION OR MEANING OF MENSTRUAL (REPRODUCTIVE) CYCLE:-
Menstruation (Greek word, men-month) is monthly uterine bleeding out flowing through vagina into vulva for 4-5 days every 28 days (24-35 days)during reproductive life of a woman from menarche to menopause.
The Menstrual cycle of 28 days starts on day of onset of menstruation and ends at day 28 on start of next mens.
The cycle consists of a series of changes taking place concurrently in the ovaries and uterine lining, stimulated by changes in blood concentration of hormones.
The menstrual cycle
The female reproductive cycle, also known as the menstrual cycle, occurs regularly in fertile women and involves changes in the hypothalamus, pituitary gland, ovaries, and endometrium. The average cycle is 28 days and includes the menstrual, proliferative, ovulatory, and secretory phases. During the cycle, levels of hormones like estrogen and progesterone rise and fall, regulating the thickening and shedding of the uterine lining. If pregnancy does not occur, menstruation begins and the cycle repeats.
Physiology of the menstrual cycle
The menstrual cycle is regulated by the hypothalamus, pituitary gland, and ovaries. It typically lasts 28 days and is divided into the follicular phase and luteal phase. During the follicular phase, follicles in the ovaries mature under the influence of hormones like FSH. Around day 14, ovulation occurs when a dominant follicle ruptures to release an egg. After ovulation, the ruptured follicle develops into the corpus luteum which secretes progesterone to prepare the uterus for potential implantation. If implantation does not occur, progesterone and estrogen levels fall, causing menstruation and the start of a new cycle.
Hormones in the menstrual cycle
The pituitary gland secretes FSH at the start of the menstrual cycle, causing the ovary to develop an egg and release estrogen. Estrogen inhibits further FSH production and stimulates the release of LH from the pituitary gland. LH causes ovulation and the release of progesterone, thickening the lining of the uterus.
Lecture notes
The menstrual cycle in human females involves both an ovarian cycle and uterine cycle. The ovarian cycle involves the release of a mature egg once every 28 days, while the uterine cycle prepares the uterus for potential pregnancy. There are four phases of the menstrual cycle: menstruation, follicle, ovulation, and corpus luteum. The menstruation phase involves bleeding and shedding of the uterine lining. The follicle phase stimulates follicle development through FSH. Ovulation occurs during the ovulation phase when LH causes the release of an egg. During the corpus luteum phase, the ruptured follicle forms the corpus luteum which produces progesterone to maintain the uterine lining if fertilization occurs.
Menstrual cycle
The document discusses the female menstrual cycle. It begins at menarche around age 12-15 and ends at menopause around age 45-50. The typical cycle is 28 days and consists of two phases - the follicular phase where an ovarian follicle matures and is released during ovulation on day 14, and the luteal phase where the corpus luteum forms. Hormonal changes in the ovaries, uterus, vagina and cervix occur under the influence of hormones like estrogen and progesterone. The cycle regulates female reproductive functions and prepares the body for potential pregnancy each month.
Formation&Development Of Reproductive System
The document summarizes key aspects of human reproduction, including:
1) Sexual reproduction involves the combination of genes from two individuals through sexual intercourse, increasing genetic variation and the chances of species survival.
2) Sex determination is based on whether a zygote inherits an X or Y chromosome from the sperm. Males have XY and females have XX.
3) The development of testes or ovaries in early development depends on the presence or absence of testis-determining factor on the Y chromosome.
4) Sex hormones direct the development of external and internal reproductive structures during development.
The menstrual cycle 15.02.2021
The menstrual cycle consists of four phases - menstruation, the follicular phase, ovulation, and the luteal phase. It is controlled by hormones produced by the hypothalamus and pituitary glands. During the follicular phase, FSH stimulates follicle growth in the ovaries. Ovulation occurs when an LH surge causes the release of an egg. In the luteal phase, the corpus luteum produces progesterone and estrogen to prepare the uterus for potential pregnancy. Common issues include painful or heavy periods, which can be caused by hormonal imbalances or underlying conditions.
The menstrual cycle
The document discusses the physiology of menstruation, including:
1. The hypothalamus and pituitary gland regulate the menstrual cycle by releasing hormones like FSH and LH that cause egg maturation and ovulation.
2. During ovulation, a follicle ruptures and releases an egg, leaving behind the corpus luteum which produces progesterone.
3. In the absence of fertilization, hormone levels fall and the uterine lining breaks down and is shed during menstruation.
The menstrual cycle
The menstrual cycle is the series of changes that occur in a woman's reproductive system in preparation for pregnancy. It is controlled by hormones and typically lasts around 28 days, though the length can vary. The cycle involves three phases - the menstrual, proliferative, and secretory phases. During ovulation, an egg is released from the ovaries if pregnancy does not occur. The cycle then repeats each month until menopause, which usually occurs between ages 45-55.
Menstrual cycle
The menstrual cycle is the process in which females ripen and release one mature egg each month under control of the endocrine system. The average cycle is 28 days long and includes the menstrual, proliferative, ovulatory, and secretory phases. During ovulation, a mature egg is released from the ovaries. If the egg is not fertilized, menstrual bleeding occurs and the cycle repeats. The cycle allows for reproduction and continues monthly from menarche to menopause unless interrupted by pregnancy.
Menstrual cycle
The menstrual cycle involves cyclic changes in the ovaries and uterus that occur approximately every 28 days in females. It includes the thickening of the uterine lining under the influence of estrogen and progesterone. Around day 14, a spike in LH triggers ovulation and progesterone production. If fertilization does not occur, progesterone levels fall and menstruation begins as the uterine lining sheds. This cycle is governed by hormones from the pituitary gland and ovaries.
Menstrual cycle
The menstrual cycle is the regular natural change that occurs in the female reproductive system, controlled by hormones. It involves the development and release of an egg (ovulation), as well as thickening of the uterine lining to prepare for pregnancy. If the egg is not fertilized, the uterine lining sheds through menstruation, beginning a new cycle. The typical cycle lasts 28 days and includes the menstrual, follicular, ovulation, and luteal phases. During ovulation, an egg is released and can be fertilized for up to 24 hours.
THE REPRODUCTIVE SYSTEM
The female reproductive system consists of internal and external organs. The internal organs include the ovaries, which produce eggs and hormones, the fallopian tubes which pick up eggs from the ovaries, and the uterus which nourishes a developing embryo. The external organs include the vagina and vulva. The female reproductive system undergoes monthly changes in a menstrual cycle regulated by hormones, with the goal of reproduction through ovulation, fertilization, and embryo implantation.
Gametogenesis and fertilization
This document discusses gametogenesis and fertilization in humans. It describes the processes of spermatogenesis in males, where spermatogonia undergo meiosis to form spermatids over 64 days, and oogenesis in females. Fertilization occurs when a sperm and egg unite in the uterine tubes, restoring the diploid chromosome number and determining the embryo's sex. The result can be a single embryo, or monozygotic or dizygotic twins in rare cases of splitting or separate eggs being fertilized.
Spermatogenesis
This document summarizes the process of spermatogenesis and sperm development. It describes how sperm develop from immature forms through spermatogenesis and spermiogenesis in the testes, with support from Leydig and Sertoli cells. The document also outlines characteristics of mature semen and various factors that can influence sperm development, including hormones, temperature, diet, and environmental exposures.
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menstural cycle
The document discusses the hormones released during the menstrual cycle and the steps involved. It describes that the menstrual cycle involves three phases - the menstrual phase, proliferative phase, and secretory phase. The menstrual phase lasts for 4 days and involves shedding of the endometrial lining. The proliferative phase lasts 10 days and involves thickening of the endometrial lining in preparation for implantation. The secretory phase lasts 15-28 days and involves secretion of hormones like progesterone to support implantation if fertilization occurs. Key hormones released during the cycle include FSH, LH, progesterone, and estrogen, which regulate follicle development, ovulation, and uterine lining changes.
Ovarian and menstrual cycle
The document summarizes the female ovarian and menstrual cycle. It discusses the female reproductive organs and hormones involved in the monthly cycle. It describes the process of oogenesis where oogonia develop into oocytes in the ovaries from fetal life until ovulation. In contrast, spermatogenesis is a continual process in males where spermatogonia can produce millions of sperm daily. The cycle is regulated by levels of gonadotropins and hormones, with the corpus luteum developing after ovulation and menstruation occurring when stimulation decreases.
Menstrual cycle ppt nitin
The menstrual cycle is regulated by fluctuating sex hormones from the pituitary gland. It consists of four phases: the follicular phase where follicles in the ovaries mature and estrogen levels rise, ovulation where a mature egg is released, the luteal phase where the corpus luteum produces progesterone, and menstruation where the uterine lining sheds if pregnancy does not occur. The cycle typically lasts around 28 days and involves changes in the ovaries and uterus governed by hormones that prepare the body for potential pregnancy each month.
Menstrual Cycle
1. The menstrual cycle refers to the cyclical changes in the female reproductive system during the reproductive phase. It involves changes in hormone levels, the ovaries, and the uterus.
2. The menstrual cycle consists of three phases - the follicular phase, ovulation, and the luteal phase. It is controlled by hormones from the pituitary gland and ovaries and typically lasts around 28 days.
3. During ovulation, a mature follicle ruptures and releases an egg. If the egg is not fertilized, hormone levels fall and the uterine lining sheds, resulting in menstruation and the start of a new cycle.
The normal menstrual cycle
The normal menstrual cycle involves hormonal signaling between the hypothalamus, pituitary gland, and ovaries. During the follicular phase, FSH causes follicles to mature and produce estrogen in the ovaries. Rising estrogen triggers a LH surge, causing ovulation. After ovulation, the corpus luteum forms and produces progesterone, which prepares the endometrium for potential implantation during the luteal phase. If implantation does not occur, falling progesterone triggers menstruation and shedding of the endometrial lining. This begins a new cycle.
Menstrual cycle
The female reproductive cycle involves cyclical changes in the ovaries and uterus controlled by hormones. Each cycle typically lasts around 28 days and consists of four phases: the menstrual phase where the uterus sheds its lining if ovulation did not occur; the preovulatory phase where a follicle matures and estrogen levels rise; ovulation of the follicle on around day 14; and the postovulatory phase where the corpus luteum forms and secretes progesterone to thicken the uterine lining to prepare for potential implantation if fertilization occurs. If no fertilization, the corpus luteum regresses and menstruation begins, starting a new cycle.
Menstrual cycle
DEFINITION OR MEANING OF MENSTRUAL (REPRODUCTIVE) CYCLE:-
Menstruation (Greek word, men-month) is monthly uterine bleeding out flowing through vagina into vulva for 4-5 days every 28 days (24-35 days)during reproductive life of a woman from menarche to menopause.
The Menstrual cycle of 28 days starts on day of onset of menstruation and ends at day 28 on start of next mens.
The cycle consists of a series of changes taking place concurrently in the ovaries and uterine lining, stimulated by changes in blood concentration of hormones.
The menstrual cycle
The female reproductive cycle, also known as the menstrual cycle, occurs regularly in fertile women and involves changes in the hypothalamus, pituitary gland, ovaries, and endometrium. The average cycle is 28 days and includes the menstrual, proliferative, ovulatory, and secretory phases. During the cycle, levels of hormones like estrogen and progesterone rise and fall, regulating the thickening and shedding of the uterine lining. If pregnancy does not occur, menstruation begins and the cycle repeats.
Physiology of the menstrual cycle
The menstrual cycle is regulated by the hypothalamus, pituitary gland, and ovaries. It typically lasts 28 days and is divided into the follicular phase and luteal phase. During the follicular phase, follicles in the ovaries mature under the influence of hormones like FSH. Around day 14, ovulation occurs when a dominant follicle ruptures to release an egg. After ovulation, the ruptured follicle develops into the corpus luteum which secretes progesterone to prepare the uterus for potential implantation. If implantation does not occur, progesterone and estrogen levels fall, causing menstruation and the start of a new cycle.
Hormones in the menstrual cycle
The pituitary gland secretes FSH at the start of the menstrual cycle, causing the ovary to develop an egg and release estrogen. Estrogen inhibits further FSH production and stimulates the release of LH from the pituitary gland. LH causes ovulation and the release of progesterone, thickening the lining of the uterus.
Lecture notes
The menstrual cycle in human females involves both an ovarian cycle and uterine cycle. The ovarian cycle involves the release of a mature egg once every 28 days, while the uterine cycle prepares the uterus for potential pregnancy. There are four phases of the menstrual cycle: menstruation, follicle, ovulation, and corpus luteum. The menstruation phase involves bleeding and shedding of the uterine lining. The follicle phase stimulates follicle development through FSH. Ovulation occurs during the ovulation phase when LH causes the release of an egg. During the corpus luteum phase, the ruptured follicle forms the corpus luteum which produces progesterone to maintain the uterine lining if fertilization occurs.
Menstrual cycle
The document discusses the female menstrual cycle. It begins at menarche around age 12-15 and ends at menopause around age 45-50. The typical cycle is 28 days and consists of two phases - the follicular phase where an ovarian follicle matures and is released during ovulation on day 14, and the luteal phase where the corpus luteum forms. Hormonal changes in the ovaries, uterus, vagina and cervix occur under the influence of hormones like estrogen and progesterone. The cycle regulates female reproductive functions and prepares the body for potential pregnancy each month.
Formation&Development Of Reproductive System
The document summarizes key aspects of human reproduction, including:
1) Sexual reproduction involves the combination of genes from two individuals through sexual intercourse, increasing genetic variation and the chances of species survival.
2) Sex determination is based on whether a zygote inherits an X or Y chromosome from the sperm. Males have XY and females have XX.
3) The development of testes or ovaries in early development depends on the presence or absence of testis-determining factor on the Y chromosome.
4) Sex hormones direct the development of external and internal reproductive structures during development.
The menstrual cycle 15.02.2021
The menstrual cycle consists of four phases - menstruation, the follicular phase, ovulation, and the luteal phase. It is controlled by hormones produced by the hypothalamus and pituitary glands. During the follicular phase, FSH stimulates follicle growth in the ovaries. Ovulation occurs when an LH surge causes the release of an egg. In the luteal phase, the corpus luteum produces progesterone and estrogen to prepare the uterus for potential pregnancy. Common issues include painful or heavy periods, which can be caused by hormonal imbalances or underlying conditions.
The menstrual cycle
The document discusses the physiology of menstruation, including:
1. The hypothalamus and pituitary gland regulate the menstrual cycle by releasing hormones like FSH and LH that cause egg maturation and ovulation.
2. During ovulation, a follicle ruptures and releases an egg, leaving behind the corpus luteum which produces progesterone.
3. In the absence of fertilization, hormone levels fall and the uterine lining breaks down and is shed during menstruation.
The menstrual cycle
The menstrual cycle is the series of changes that occur in a woman's reproductive system in preparation for pregnancy. It is controlled by hormones and typically lasts around 28 days, though the length can vary. The cycle involves three phases - the menstrual, proliferative, and secretory phases. During ovulation, an egg is released from the ovaries if pregnancy does not occur. The cycle then repeats each month until menopause, which usually occurs between ages 45-55.
Menstrual cycle
The menstrual cycle is the process in which females ripen and release one mature egg each month under control of the endocrine system. The average cycle is 28 days long and includes the menstrual, proliferative, ovulatory, and secretory phases. During ovulation, a mature egg is released from the ovaries. If the egg is not fertilized, menstrual bleeding occurs and the cycle repeats. The cycle allows for reproduction and continues monthly from menarche to menopause unless interrupted by pregnancy.
Menstrual cycle
The menstrual cycle involves cyclic changes in the ovaries and uterus that occur approximately every 28 days in females. It includes the thickening of the uterine lining under the influence of estrogen and progesterone. Around day 14, a spike in LH triggers ovulation and progesterone production. If fertilization does not occur, progesterone levels fall and menstruation begins as the uterine lining sheds. This cycle is governed by hormones from the pituitary gland and ovaries.
Menstrual cycle
The menstrual cycle is the regular natural change that occurs in the female reproductive system, controlled by hormones. It involves the development and release of an egg (ovulation), as well as thickening of the uterine lining to prepare for pregnancy. If the egg is not fertilized, the uterine lining sheds through menstruation, beginning a new cycle. The typical cycle lasts 28 days and includes the menstrual, follicular, ovulation, and luteal phases. During ovulation, an egg is released and can be fertilized for up to 24 hours.
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THE REPRODUCTIVE SYSTEM
The female reproductive system consists of internal and external organs. The internal organs include the ovaries, which produce eggs and hormones, the fallopian tubes which pick up eggs from the ovaries, and the uterus which nourishes a developing embryo. The external organs include the vagina and vulva. The female reproductive system undergoes monthly changes in a menstrual cycle regulated by hormones, with the goal of reproduction through ovulation, fertilization, and embryo implantation.
Gametogenesis and fertilization
This document discusses gametogenesis and fertilization in humans. It describes the processes of spermatogenesis in males, where spermatogonia undergo meiosis to form spermatids over 64 days, and oogenesis in females. Fertilization occurs when a sperm and egg unite in the uterine tubes, restoring the diploid chromosome number and determining the embryo's sex. The result can be a single embryo, or monozygotic or dizygotic twins in rare cases of splitting or separate eggs being fertilized.
Spermatogenesis
This document summarizes the process of spermatogenesis and sperm development. It describes how sperm develop from immature forms through spermatogenesis and spermiogenesis in the testes, with support from Leydig and Sertoli cells. The document also outlines characteristics of mature semen and various factors that can influence sperm development, including hormones, temperature, diet, and environmental exposures.
Human Reproduction
Sexual reproduction involves the fusion of male and female gametes called sperm and eggs. Sperm are produced in the testes of males and contain 23 chromosomes, while eggs are produced in ovaries of females and also contain 23 chromosomes. When sperm fertilizes an egg, they fuse to form a zygote with 46 chromosomes that can develop into an embryo. Puberty causes the development of secondary sex characteristics as the reproductive systems become functional, leading to ovulation and menstruation cycles in females and sperm production in males. Fertilization occurs if sperm meets an egg during ovulation, forming an embryo that implants in the uterus and receives nutrients via the placenta.
Hypersensitivity reactions lecture notes
This document summarizes the four main types of hypersensitivity reactions:
1. Type I are immediate and involve IgE antibodies binding to mast cells and basophils.
2. Type II involve IgG or IgM antibodies binding to cells and activating complement, leading to cell lysis.
3. Type III involve immune complexes circulating in the blood and depositing in tissues, activating complement and causing inflammation.
4. Type IV are delayed reactions mediated by T cells and involve activation of macrophages, leading to chronic inflammation.
Menstrual Cycle
The menstrual cycle typically lasts 28 days and involves changes in the female reproductive system. It begins with menstruation, followed by the proliferative phase where the endometrium thickens in response to rising estrogen levels. Around day 14, LH and FSH cause ovulation to occur. After ovulation, the secretory phase begins where progesterone levels rise, preparing the endometrium in case of fertilization. If no fertilization occurs, progesterone and estrogen levels fall, causing menstruation to start again.
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1) The female reproductive hormones are regulated by the hypothalamus, pituitary gland, and ovaries. The hypothalamus produces GnRH which stimulates the pituitary to release FSH and LH.
2) FSH and LH control estrogen and progesterone production in the ovaries throughout the menstrual cycle. Estrogen causes the uterine lining to grow during the proliferative phase.
3) Progesterone thickens the uterine lining during the secretory phase in preparation for potential pregnancy. If implantation does not occur, progesterone and estrogen levels fall, causing menstruation.
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The menstrual cycle involves cyclical hormonal changes coordinated by the hypothalamus, pituitary gland, and ovaries. During the follicular phase, follicle stimulating hormone (FSH) causes follicle development in the ovaries. Near mid-cycle, luteinizing hormone (LH) triggers ovulation. After ovulation, the corpus luteum forms and secretes progesterone to thicken the uterine lining. If implantation does not occur, progesterone levels drop and menstruation begins. Estrogen and progesterone levels fluctuate monthly to regulate the development and shedding of the uterine lining, resulting in periodic menstrual bleeding.
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The document summarizes the hormonal regulation of the male and female reproductive systems. It discusses how hormones control spermatogenesis and ovulation in males and females, respectively. The key hormones involved are gonadotropin-releasing hormone (GnRH), follicle-stimulating hormone (FSH), luteinizing hormone (LH), testosterone, estrogen, and progesterone. GnRH stimulates FSH and LH release, which then regulate sperm and egg production through feedback loops involving testosterone, estrogen, and progesterone.
Female hormones
The document summarizes female hormone synthesis and function. It discusses how the ovary orchestrates oocyte development and release while also producing hormones like estrogen and progesterone. These hormones regulate the menstrual cycle and prepare the uterus for potential pregnancy. The cycle involves fluctuations in hormone levels that influence the development and shedding of the uterine lining over approximately 28 days until menopause ends the female reproductive years.
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The document discusses female reproductive physiology, describing the stages from puberty through menopause. It focuses on the menstrual cycle, explaining the hormonal regulation of the hypothalamic-pituitary-ovarian axis and the cyclic changes that occur in the ovaries and endometrium under the influence of estrogen and progesterone. During the proliferative phase, estrogen stimulates endometrial growth, while the secretory phase is characterized by the effects of progesterone on the endometrium to prepare for potential implantation.
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This document discusses several key hormones involved in human reproduction from ovulation through fertilization. It focuses on gonadotropin-releasing hormone (GnRH) as the central regulator of the reproductive axis. GnRH stimulates the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary gland. FSH and LH then regulate ovarian and testicular function. The document also discusses the roles, functions, and regulation of estradiol, progesterone, testosterone, and other reproductive hormones in both female and male bodies.
Hormone
FSH is a hormone released by the pituitary gland that regulates reproduction. It stimulates the growth and development of follicles in the ovaries and testes. FSH is a glycoprotein made of two subunits, with an identical alpha subunit and a unique beta subunit that determines its function. FSH levels rise and fall at different points in the menstrual cycle and influence follicle development and ovulation in females. In males, FSH stimulates sperm production. Abnormally high or low FSH levels can indicate fertility issues.
Menstrual cycle
The menstrual cycle is regulated by hormones released by the hypothalamus and pituitary glands. The hypothalamus releases hormones that stimulate the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH causes follicles in the ovaries to mature and LH triggers ovulation. Estrogen and progesterone levels fluctuate during the menstrual cycle which is divided into the follicular, ovulatory, and luteal phases. Menstruation occurs if fertilization does not take place. Common menstrual disorders include dysmenorrhea, menorrhagia, and amenorrhea.
Physiology of The Menstrual Cycle
The menstrual cycle is regulated by the hypothalamus, pituitary gland, and ovaries. It typically lasts 28 days and has two phases: the follicular phase where an egg is recruited and develops prior to ovulation on day 14, and the luteal phase where the corpus luteum forms and secretes progesterone to prepare the uterus if pregnancy occurs. If implantation does not happen, progesterone and estrogen levels fall causing menstruation. The endometrium thickens and breaks down cyclically in response to changing hormone levels throughout the cycle.
Disorders of female reproductive system and menopause - A glimpse for physici...
Disorders of female reproductive system and menopause - A glimpse for physici...Chetan Ganteppanavar
The document discusses the female reproductive system. It summarizes that the female reproductive system regulates hormonal changes responsible for puberty and the menstrual cycle through dynamic interaction between the hypothalamus, pituitary gland, and ovaries. This results in repeated cycles of follicle development, ovulation, and preparation of the uterine lining for potential implantation. The document then goes on to describe the anatomy and blood supply of the external and internal female genital organs.Female genital system diseases & menopause
The document discusses the female reproductive system. It summarizes that the female reproductive system regulates hormonal changes responsible for puberty and reproduction through dynamic interactions between the hypothalamus, pituitary gland, and ovaries. This results in repetitive cycles of follicle development, ovulation, and preparation of the uterine lining for potential implantation. The document then goes on to describe the anatomy and blood supply of the external and internal female genital organs.
Reproductive Hormones
This document discusses reproductive hormones. It defines reproductive hormones as those responsible for sexual development, libido, and menstruation. It describes the hypothalamic-pituitary-gonadal axis that controls hormone production and can cause issues if dysfunctional. It outlines the roles of FSH, LH, testosterone, estrogen, and progesterone in the male and female reproductive systems and menstrual/estrous cycles. Finally, it discusses some health impacts of reproductive hormones like osteoporosis, heart disease, infertility, and mood changes.
Ovary: Structure and hormonal regulation
Slides describe the structure of ovary, folliculogenesis, hormonal control of female reproductive cycle, mechanism of ovulation, female sex hormones and their function.
Menstrual cycle
this lecture describes the physiologic changes that occur each month with the female in her childbearing age, with some clinical notes
MENSTRUAL HEALTH & HYGIENE PPT DR SUJIT KUMR MD
This scientific paper presentation summarizes menstrual health from menarche to menopause. It describes the normal menstrual cycle which is regulated by the hypothalamic-pituitary-ovarian axis. This involves cyclic changes in the ovaries and uterus in response to hormones like FSH, LH, estrogen and progesterone over three phases - the follicular, ovulatory and luteal phases. It also discusses characteristics of normal menstruation and provides tips for menstrual hygiene and comfort measures during menstruation like the proper use of sanitary pads and tampons.
Menstrual cycle fertilisation and implantation
The menstrual cycle involves the thickening and shedding of the uterine lining each month from puberty to menopause except when pregnant. It occurs in phases regulated by hormones from the pituitary gland and ovaries. In the follicular phase, follicle stimulating hormone (FSH) causes follicle development and estrogen release, thickening the uterine lining. Near ovulation, luteinizing hormone (LH) triggers follicle rupture and egg release. If no fertilization, progesterone levels fall and menstruation begins as the lining is shed. Fertilization usually occurs in the fallopian tubes as an egg fuses with sperm. The fertilized egg may then implant in the uterine lining during the luteal phase if pregnancy occurs.
Hormonal Control of Reproductive Process in Females
The hormones controlling the female reproductive system include gonadotropin-releasing hormone (GnRH), follicle-stimulating hormone (FSH) and leutenizing hormone (LH), all of which are produced in the brain; oestrogen and progesterone produced by the ovaries and the corpus luteum; and human chorionic gonadotropin (HCG).
Menstrual cycle
The menstrual cycle is regulated by hormones released by the hypothalamus and pituitary glands. The hypothalamus releases hormones that stimulate the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH causes follicles in the ovaries to mature and estrogen levels to rise. The LH surge triggers ovulation. If fertilization does not occur, progesterone and estrogen levels fall and menstruation begins. The typical cycle is around 28 days and consists of the follicular, ovulatory, and luteal phases. Menstruation involves shedding of the uterine lining if pregnancy does not occur.
Similar to The Uterine ( Menstrual) Cycleaudio (20)
The important hormones from ovulation to fertilization
The important hormones from ovulation to fertilization
Disorders of female reproductive system and menopause - A glimpse for physici...
Disorders of female reproductive system and menopause - A glimpse for physici...
Hormonal Control of Reproductive Process in Females
Hormonal Control of Reproductive Process in Females
The Uterine ( Menstrual) Cycleaudio
- 1. The Uterine (Menstrual) Cycle Group 8: Diana Hegazin, Stacey Dust, Deborah Ondimu, Gayle Woods, DerejeGemeda, TochiOhale That’s Ursula the Uterus!
- 2. 2 UTERINE CYCLE Overview MENSTRUATION:- BREAKDOWN OF THE UTERINE ENDOMETRIUM AND VAGINAL BLEEDING DUE TO LOW ESTROGEN AND PROGESTRONE LEVELS. Menstrual days: 1-5 PROLIFERATIVE PHASE:- GROWTH OF THE UTERINE ENDOMETRIUM UNDER ESTROGEN STIMULATION. Proliferative days: 6-14 SECRETORY PHASE:- STIMULATION OF THE UTERINE GLANDS SECRETION BY PROGESTRONE. Secretory days: 15-27 Ischemic days: 27-28
- 3. 3 THE FEMALE HORMONES HYPOTHALAMUS:- GONADOTROPIN RELEASING HORMONE [GnRH]. PITUITARY:-LUTEINIZING HORMONE [LH] FOLLICLE STIMULATING HORMONE [FSH] PROLACTIN [PRL] OVARY:- DEVELOPING FOLLICLE:- ESTROGEN. CORPUS LUTEUM:- PROGESTRONE.
- 4. 4 THE FEMALE HORMONES FUNCTIONS FOLLICLE STIMULATING HORMONE [FSH] STIMULATE FOLLICULAR DEVELOPMENT, MATURATION & ESTROGEN SECRETION. LUTEINIZING HORMONE [LH] STIMULATE THE CORPUS LUTEUM FORMATION AND PROGESTRONE SECRETION. PROLACTIN [PRL] STIMULATE BREAST ALVEOLI MILK PRODUCTION.
- 5. 5 ESTROGEN FUNCTIONS GROWTH & DEVELOPMENT OF FEMALE REPRODUCTIVE ORGANS. DEVELOPMENT OF FEMALE SECONDARY SEXUAL CHARACTERISTICS. GROWTH OF UTERINE ENDOMETRIUM. GROWTH OF THE BREAST DUCT SYSTEM.
- 6. 6 PROGESTRONE FUNCTIONS STIMULATION OF UTERINE GLANDS SECRETION. GROWTH OF THE BREAST ALVEOLI. INHIBITION OF UTERINE MUSCLES CONTRACTIONS DURING PREGNANCY TO PREVENT EXPULSION OF THE FETUS
- 7. 7 THE MENSTRUAL CYCLES
- 8. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) HYPOTHALAMUS RELEASES GONADOTROPIN-RELEASING HORMONE (GnRH). This stimulates the anterior pituitary to release FSH and LH.
- 9. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) FSH STIMULATES MATURATION OF PRIMARY OOCYTE IN AN IMMATURE FOLLICLE.
- 10. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) FOLLICLE PRODUCES ESTROGEN. Estrogen: (A) builds the uterine wall (the endometrium); (B) inhibits secretion of FSH.
- 11. HORMONAL REGULATION IN NONPREGNANT FEMALE HIGH LEVELS OF ESTROGEN FURTHER STIMULATE SECRETION OF LH BY ANTERIOR PITUITARY. This plus FSH also causes ovulation of the secondary oocyte – leaving follicle without egg (the corpus luteum). (Approximately day 15.)
- 12. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) CORPUS LUTEUM SECRETES ESTROGEN AND PROGESTERONE. This maintains the endometrium for 15-16 days and inhibits LH.
- 13. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) (If oocyte is not fertilized and implanted in the uterine wall) CORPUS DEGENERATES (TO CORPUS ALBICANS) AND STOPS PRODUCING ESTROGEN AND PROGESTERONE.
- 14. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) WITHOUT ESTROGEN AND PROGESTERONE, ENDOMETRIUM BREAKS DOWN – MENSTRUATION OCCURS. Menstruation is the sloughing off of the enlarged endometrial wall along with blood and mucous.
- 15. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) DECREASE IN PROGESTERONE AND LH. Low LH causes secretion of FSH by pituitary again. The cycle repeats.
- 16. HORMONAL REGULATION IN NONPREGNANT FEMALE (UTERINE CYCLE) IF – SOMEWHERE BETWEEN: CORPUS LUTEUM SECRETES ESTROGEN AND PROGESTERONE. This maintains the endometrium for 15-16 days and inhibits LH. And (If oocyte is not fertilized and implanted in the uterine wall) CORPUS DEGENERATES (TO CORPUS ALBICANS) AND STOPS PRODUCING ESTROGEN AND PROGESTERONE. SPERM GETS TO EGG... FERTILIZATION CAN TAKE PLACE, AND ULTIMATELY, EMBRYO CAN BECOME IMPLANTED IN UTERINE WALL.