SlideShare a Scribd company logo
1 of 35
OFLLIELC
SITUMINGAL
HOMRONE
FOLLICLE STIMULATING
HORMONE
LTUEINIGNZI HORMNOE
LUTEINIZING HORMONE
GENESTRO
ESTROGEN
RONETOSTES
TESTOSTERONE
GESRONETEPRO
PROGESTERONE
MENSTRUAL CYCLE
CLASS OBSERVATION 1
JENNIFER L. ESTRADA
MARCH 8,2022
MENSTRUAL CYCLE
OBJECTIVE:
The learners will be able to describe the
feedback mechanisms involved in
regulating processes in the female
reproductive system (e.g., menstrual
cycle).
GUIDE QUESTIONS:
1. What gland controls and start the menstrual cycle?
2. How many days does the bleeding occurs in a menstrual
cycle?
3. What are the hormones release by the pituitary gland?
4. What happens to the egg during the first 14 days of the
cycle? How about the uterine?
GUIDE QUESTIONS:
5. What happens to the matured egg cell after it was
released?
6. Suppose that there is sperm cell present what
happens to the egg that was fertilized?
7.Suppose that there is no sperm cell present, what
happens to the egg that was not fertilized?
MENSTRUAL CYCLE
MENSTRUAL CYCLE
1. What gland controls and start the
menstrual cycle?
PITUITARY
GLAND
2. How many days does the bleeding
occurs in a menstrual cycle?
3-7 DAYS
3. What are the hormones release by the
pituitary gland?
FOLLICLE
STIMULATING
HORMONE
LUTEINIZING
HORMONE
4.What happens to the egg during the first 14
days of the cycle? How about the uterine?
“OVULATION”
RELEASE OF THE
MATURE EGG on
the 14th day
THICKENING OF
THE UTERUS
LINING
5. What happens to the matured egg cell
after it was released?
It travels from
the ovary to the
uterus through
oviducts or
fallopian tubes
6.Suppose that there is sperm cell present
what happens to the egg that was fertilized?
The fertilized
egg/zygote will travel
through the oviducts
or fallopian tubes and
will attach to the
uterus. Where the
baby will grow.
7.Suppose that there is no sperm cell present,
what happens to the egg that was not fertilized?
Since there is no fertilized
egg, the progesterone
and estrogen will
decrease and the thick
uterine lining will shed.
Menstruation will occur.
FSH stimulates the
ovaries to release
estrogen. High level of
estrogen prevent the
further production of
FSH
Estrogen also stimulates
the release of LH from
the pituitary gland,
which in turn controls
the production of
progesterone
High levels of
progesterone then
inhibit the further
release of LH
FEEDBACK MECHANISM OF THE MENSTRUAL CYCLE
“MARK MY CALENDAR”
PROCEDURE:
1. The students will be group into two.
2. Group 1 will fill the calendar for no fertilization using the given
pictures.
Group 2 will fill the calendar with fertilization of the egg using the
given pictures.
3. Pictures will post/attach to the calendar provided by the teacher.
3. Each group will choose 1 representative to discuss their work.
4. The students will be given 10 minutes to finish their work
GROUP 2
JUDIE
WENDY
ROSE ANN
CLAIRE
ELIZABETH
GROUP 1
REYDES
ROSALIND
CHRISTIAN
ANALENE
WHY DO WE NEED TO STUDY THE
MENSTRUAL CYCLE?
To track overall health.
Tracking the menstrual cycle is so
important for couple who wants to
conceive or wants to have a family
planning.
SUMMARY
EVALUATION
Sequence the important events/steps
in the menstrual cycle. Write your
answer on the paper provided.
ASSIGNMENT
On a whole sheet of paper write at
least 10 facts/trivia about menstrual
cycle.
IMPORTANT EVENTS DURING
MENSTRUAL CYCLE
1.The Pituitary gland controls and starts the cycle.
2. The Pituitary gland releases hormones that cause the egg in the
ovary to mature. The Luteinizing Hormone (LH) initiates the
maturation of the follicles, convert ruptured follicles into corpus
luteum and causes the secretion of progesterone. The follicle
stimulating hormone (FSH) assist in the maturation of the follicles
and causes the secretion of estrogen from the follicles.
3. Meanwhile, the ovary itself releases a hormone called estrogen,
which causes the uterine lining to increase in thickness; The uterine
lining becomes thicker so that the fertilized egg can attach to it.
IMPORTANT EVENTS DURING
MENSTRUAL CYCLE
4. The ovary releases an egg on day 14. Assume that no
sperm present.
5. The egg moves through the oviduct and enters the
uterus.
6. Meanwhile the uterine lining continues to thicken.
7. The egg has not been fertilized, therefore, it will attach to
the uterus.
IMPORTANT EVENTS DURING
MENSTRUAL CYCLE
8. The thick uterine lining is no longer necessary, so the cells
of the thickened uterine lining break off and leave the
vagina. The unfertilized egg is lost and some blood is lost
too. This loss cells from the uterine lining, blood, and egg is
called menstruation.
9. After the menstruation, the cycle starts again.
FSH stimulates the
ovaries to release
estrogen. High level of
estrogen prevent the
further production of
FSH
Estrogen also stimulates
the release of LH from
the pituitary gland,
which in turn controls
the production of
progesterone
High levels of
progesterone then
inhibit the further
release of LH

More Related Content

Similar to MENSTRUAL CYCLE 4 PHASES HELLO HIHI.pptx

Grade 10 Quarter 3: The Reproductive System
Grade 10 Quarter 3: The Reproductive SystemGrade 10 Quarter 3: The Reproductive System
Grade 10 Quarter 3: The Reproductive Systemnikitaitliong
 
LS 2 7 The Reproductive System
LS 2 7 The Reproductive SystemLS 2 7 The Reproductive System
LS 2 7 The Reproductive SystemMichael Gelacio
 
Human Reproduction - II
Human Reproduction - IIHuman Reproduction - II
Human Reproduction - IIChethan Kumar
 
Science10_Q3_ver4_Mod2.pdf
Science10_Q3_ver4_Mod2.pdfScience10_Q3_ver4_Mod2.pdf
Science10_Q3_ver4_Mod2.pdfFabioJrCapito
 
Female Reproductive Cycle
Female Reproductive CycleFemale Reproductive Cycle
Female Reproductive CycleIram Qaiser
 
Reproduction & Growth
Reproduction & GrowthReproduction & Growth
Reproduction & Growthmiaceh
 
Female Genital Tract Ameer
Female Genital Tract AmeerFemale Genital Tract Ameer
Female Genital Tract Ameermohammed sediq
 
How does the menstrual cycle evolve.pdf
How does the menstrual cycle evolve.pdfHow does the menstrual cycle evolve.pdf
How does the menstrual cycle evolve.pdfEmbrace Comfort
 
Integrated Scince M3 Menstrual cycle
Integrated Scince M3 Menstrual cycleIntegrated Scince M3 Menstrual cycle
Integrated Scince M3 Menstrual cycleeLearningJa
 
Reproduction and Growth
Reproduction and GrowthReproduction and Growth
Reproduction and GrowthHajar Len
 
BSCS (Gender and Society) Group B - Module 2
BSCS (Gender and Society) Group B - Module 2BSCS (Gender and Society) Group B - Module 2
BSCS (Gender and Society) Group B - Module 2Yvonne Grace Arandela
 
poster for human systems (final copy)
poster for human systems (final copy)poster for human systems (final copy)
poster for human systems (final copy)joanne shoesmith
 
Human Systems Poster Presentation
Human Systems Poster PresentationHuman Systems Poster Presentation
Human Systems Poster Presentationjoanne shoesmith
 
Biology m13 human reproductive system
Biology m13 human reproductive systemBiology m13 human reproductive system
Biology m13 human reproductive systemdionesioable
 

Similar to MENSTRUAL CYCLE 4 PHASES HELLO HIHI.pptx (20)

Grade 10 Quarter 3: The Reproductive System
Grade 10 Quarter 3: The Reproductive SystemGrade 10 Quarter 3: The Reproductive System
Grade 10 Quarter 3: The Reproductive System
 
LS 2 7 The Reproductive System
LS 2 7 The Reproductive SystemLS 2 7 The Reproductive System
LS 2 7 The Reproductive System
 
B10vrv8343 1
B10vrv8343 1B10vrv8343 1
B10vrv8343 1
 
Human Reproduction - II
Human Reproduction - IIHuman Reproduction - II
Human Reproduction - II
 
Menstrual cycle
Menstrual cycle Menstrual cycle
Menstrual cycle
 
Science10 q3 ver4_mod2
Science10 q3 ver4_mod2Science10 q3 ver4_mod2
Science10 q3 ver4_mod2
 
Science10_Q3_ver4_Mod2.pdf
Science10_Q3_ver4_Mod2.pdfScience10_Q3_ver4_Mod2.pdf
Science10_Q3_ver4_Mod2.pdf
 
Female Reproductive Cycle
Female Reproductive CycleFemale Reproductive Cycle
Female Reproductive Cycle
 
Reproduction & Growth
Reproduction & GrowthReproduction & Growth
Reproduction & Growth
 
Reproduction
ReproductionReproduction
Reproduction
 
Updated lecture 58
Updated lecture 58 Updated lecture 58
Updated lecture 58
 
Female Genital Tract Ameer
Female Genital Tract AmeerFemale Genital Tract Ameer
Female Genital Tract Ameer
 
How does the menstrual cycle evolve.pdf
How does the menstrual cycle evolve.pdfHow does the menstrual cycle evolve.pdf
How does the menstrual cycle evolve.pdf
 
Integrated Scince M3 Menstrual cycle
Integrated Scince M3 Menstrual cycleIntegrated Scince M3 Menstrual cycle
Integrated Scince M3 Menstrual cycle
 
Reproduction and Growth
Reproduction and GrowthReproduction and Growth
Reproduction and Growth
 
PREGNANCY seminar
PREGNANCY seminarPREGNANCY seminar
PREGNANCY seminar
 
BSCS (Gender and Society) Group B - Module 2
BSCS (Gender and Society) Group B - Module 2BSCS (Gender and Society) Group B - Module 2
BSCS (Gender and Society) Group B - Module 2
 
poster for human systems (final copy)
poster for human systems (final copy)poster for human systems (final copy)
poster for human systems (final copy)
 
Human Systems Poster Presentation
Human Systems Poster PresentationHuman Systems Poster Presentation
Human Systems Poster Presentation
 
Biology m13 human reproductive system
Biology m13 human reproductive systemBiology m13 human reproductive system
Biology m13 human reproductive system
 

Recently uploaded

4.18.24 Movement Legacies, Reflection, and Review.pptx
4.18.24 Movement Legacies, Reflection, and Review.pptx4.18.24 Movement Legacies, Reflection, and Review.pptx
4.18.24 Movement Legacies, Reflection, and Review.pptxmary850239
 
ROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptxROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptxVanesaIglesias10
 
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...Postal Advocate Inc.
 
How to Add Barcode on PDF Report in Odoo 17
How to Add Barcode on PDF Report in Odoo 17How to Add Barcode on PDF Report in Odoo 17
How to Add Barcode on PDF Report in Odoo 17Celine George
 
Choosing the Right CBSE School A Comprehensive Guide for Parents
Choosing the Right CBSE School A Comprehensive Guide for ParentsChoosing the Right CBSE School A Comprehensive Guide for Parents
Choosing the Right CBSE School A Comprehensive Guide for Parentsnavabharathschool99
 
ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...
ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...
ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...JojoEDelaCruz
 
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERPHow to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERPCeline George
 
Active Learning Strategies (in short ALS).pdf
Active Learning Strategies (in short ALS).pdfActive Learning Strategies (in short ALS).pdf
Active Learning Strategies (in short ALS).pdfPatidar M
 
Presentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptxPresentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptxRosabel UA
 
AUDIENCE THEORY -CULTIVATION THEORY - GERBNER.pptx
AUDIENCE THEORY -CULTIVATION THEORY -  GERBNER.pptxAUDIENCE THEORY -CULTIVATION THEORY -  GERBNER.pptx
AUDIENCE THEORY -CULTIVATION THEORY - GERBNER.pptxiammrhaywood
 
Grade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdf
Grade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdfGrade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdf
Grade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdfJemuel Francisco
 
Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17
Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17
Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17Celine George
 
Textual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHSTextual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHSMae Pangan
 
TEACHER REFLECTION FORM (NEW SET........).docx
TEACHER REFLECTION FORM (NEW SET........).docxTEACHER REFLECTION FORM (NEW SET........).docx
TEACHER REFLECTION FORM (NEW SET........).docxruthvilladarez
 
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdfInclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdfTechSoup
 
The Contemporary World: The Globalization of World Politics
The Contemporary World: The Globalization of World PoliticsThe Contemporary World: The Globalization of World Politics
The Contemporary World: The Globalization of World PoliticsRommel Regala
 
Oppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and FilmOppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and FilmStan Meyer
 

Recently uploaded (20)

4.18.24 Movement Legacies, Reflection, and Review.pptx
4.18.24 Movement Legacies, Reflection, and Review.pptx4.18.24 Movement Legacies, Reflection, and Review.pptx
4.18.24 Movement Legacies, Reflection, and Review.pptx
 
ROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptxROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptx
 
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
 
YOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptx
YOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptxYOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptx
YOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptx
 
How to Add Barcode on PDF Report in Odoo 17
How to Add Barcode on PDF Report in Odoo 17How to Add Barcode on PDF Report in Odoo 17
How to Add Barcode on PDF Report in Odoo 17
 
Choosing the Right CBSE School A Comprehensive Guide for Parents
Choosing the Right CBSE School A Comprehensive Guide for ParentsChoosing the Right CBSE School A Comprehensive Guide for Parents
Choosing the Right CBSE School A Comprehensive Guide for Parents
 
ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...
ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...
ENG 5 Q4 WEEk 1 DAY 1 Restate sentences heard in one’s own words. Use appropr...
 
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERPHow to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERP
 
Active Learning Strategies (in short ALS).pdf
Active Learning Strategies (in short ALS).pdfActive Learning Strategies (in short ALS).pdf
Active Learning Strategies (in short ALS).pdf
 
Presentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptxPresentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptx
 
AUDIENCE THEORY -CULTIVATION THEORY - GERBNER.pptx
AUDIENCE THEORY -CULTIVATION THEORY -  GERBNER.pptxAUDIENCE THEORY -CULTIVATION THEORY -  GERBNER.pptx
AUDIENCE THEORY -CULTIVATION THEORY - GERBNER.pptx
 
Grade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdf
Grade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdfGrade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdf
Grade 9 Quarter 4 Dll Grade 9 Quarter 4 DLL.pdf
 
FINALS_OF_LEFT_ON_C'N_EL_DORADO_2024.pptx
FINALS_OF_LEFT_ON_C'N_EL_DORADO_2024.pptxFINALS_OF_LEFT_ON_C'N_EL_DORADO_2024.pptx
FINALS_OF_LEFT_ON_C'N_EL_DORADO_2024.pptx
 
Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17
Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17
Incoming and Outgoing Shipments in 3 STEPS Using Odoo 17
 
Textual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHSTextual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHS
 
Paradigm shift in nursing research by RS MEHTA
Paradigm shift in nursing research by RS MEHTAParadigm shift in nursing research by RS MEHTA
Paradigm shift in nursing research by RS MEHTA
 
TEACHER REFLECTION FORM (NEW SET........).docx
TEACHER REFLECTION FORM (NEW SET........).docxTEACHER REFLECTION FORM (NEW SET........).docx
TEACHER REFLECTION FORM (NEW SET........).docx
 
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdfInclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
 
The Contemporary World: The Globalization of World Politics
The Contemporary World: The Globalization of World PoliticsThe Contemporary World: The Globalization of World Politics
The Contemporary World: The Globalization of World Politics
 
Oppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and FilmOppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and Film
 

MENSTRUAL CYCLE 4 PHASES HELLO HIHI.pptx

  • 1.
  • 7. MENSTRUAL CYCLE CLASS OBSERVATION 1 JENNIFER L. ESTRADA MARCH 8,2022
  • 9. OBJECTIVE: The learners will be able to describe the feedback mechanisms involved in regulating processes in the female reproductive system (e.g., menstrual cycle).
  • 10. GUIDE QUESTIONS: 1. What gland controls and start the menstrual cycle? 2. How many days does the bleeding occurs in a menstrual cycle? 3. What are the hormones release by the pituitary gland? 4. What happens to the egg during the first 14 days of the cycle? How about the uterine?
  • 11. GUIDE QUESTIONS: 5. What happens to the matured egg cell after it was released? 6. Suppose that there is sperm cell present what happens to the egg that was fertilized? 7.Suppose that there is no sperm cell present, what happens to the egg that was not fertilized?
  • 14.
  • 15. 1. What gland controls and start the menstrual cycle? PITUITARY GLAND
  • 16. 2. How many days does the bleeding occurs in a menstrual cycle? 3-7 DAYS
  • 17. 3. What are the hormones release by the pituitary gland? FOLLICLE STIMULATING HORMONE LUTEINIZING HORMONE
  • 18. 4.What happens to the egg during the first 14 days of the cycle? How about the uterine? “OVULATION” RELEASE OF THE MATURE EGG on the 14th day THICKENING OF THE UTERUS LINING
  • 19. 5. What happens to the matured egg cell after it was released? It travels from the ovary to the uterus through oviducts or fallopian tubes
  • 20. 6.Suppose that there is sperm cell present what happens to the egg that was fertilized? The fertilized egg/zygote will travel through the oviducts or fallopian tubes and will attach to the uterus. Where the baby will grow.
  • 21. 7.Suppose that there is no sperm cell present, what happens to the egg that was not fertilized? Since there is no fertilized egg, the progesterone and estrogen will decrease and the thick uterine lining will shed. Menstruation will occur.
  • 22. FSH stimulates the ovaries to release estrogen. High level of estrogen prevent the further production of FSH Estrogen also stimulates the release of LH from the pituitary gland, which in turn controls the production of progesterone High levels of progesterone then inhibit the further release of LH FEEDBACK MECHANISM OF THE MENSTRUAL CYCLE
  • 23.
  • 24. “MARK MY CALENDAR” PROCEDURE: 1. The students will be group into two. 2. Group 1 will fill the calendar for no fertilization using the given pictures. Group 2 will fill the calendar with fertilization of the egg using the given pictures. 3. Pictures will post/attach to the calendar provided by the teacher. 3. Each group will choose 1 representative to discuss their work. 4. The students will be given 10 minutes to finish their work
  • 25. GROUP 2 JUDIE WENDY ROSE ANN CLAIRE ELIZABETH GROUP 1 REYDES ROSALIND CHRISTIAN ANALENE
  • 26.
  • 27. WHY DO WE NEED TO STUDY THE MENSTRUAL CYCLE? To track overall health. Tracking the menstrual cycle is so important for couple who wants to conceive or wants to have a family planning.
  • 29. EVALUATION Sequence the important events/steps in the menstrual cycle. Write your answer on the paper provided.
  • 30. ASSIGNMENT On a whole sheet of paper write at least 10 facts/trivia about menstrual cycle.
  • 31.
  • 32. IMPORTANT EVENTS DURING MENSTRUAL CYCLE 1.The Pituitary gland controls and starts the cycle. 2. The Pituitary gland releases hormones that cause the egg in the ovary to mature. The Luteinizing Hormone (LH) initiates the maturation of the follicles, convert ruptured follicles into corpus luteum and causes the secretion of progesterone. The follicle stimulating hormone (FSH) assist in the maturation of the follicles and causes the secretion of estrogen from the follicles. 3. Meanwhile, the ovary itself releases a hormone called estrogen, which causes the uterine lining to increase in thickness; The uterine lining becomes thicker so that the fertilized egg can attach to it.
  • 33. IMPORTANT EVENTS DURING MENSTRUAL CYCLE 4. The ovary releases an egg on day 14. Assume that no sperm present. 5. The egg moves through the oviduct and enters the uterus. 6. Meanwhile the uterine lining continues to thicken. 7. The egg has not been fertilized, therefore, it will attach to the uterus.
  • 34. IMPORTANT EVENTS DURING MENSTRUAL CYCLE 8. The thick uterine lining is no longer necessary, so the cells of the thickened uterine lining break off and leave the vagina. The unfertilized egg is lost and some blood is lost too. This loss cells from the uterine lining, blood, and egg is called menstruation. 9. After the menstruation, the cycle starts again.
  • 35. FSH stimulates the ovaries to release estrogen. High level of estrogen prevent the further production of FSH Estrogen also stimulates the release of LH from the pituitary gland, which in turn controls the production of progesterone High levels of progesterone then inhibit the further release of LH