Female Reproductive Cycle

1. FEMALE
REPRODUCTIVE CYCLE
30 NOV

2. • In female reproductive cycle exists and in each cycle one egg is produced and this
cycle ends at age of 50 and it is called MENUPAUSE.
• In male onset of puberty the sperm production become a continuous process and
continue till death.
•TIME DURATION OF REPRODUCTIVE CYCLE:
• In females the reproductive cycle completes in 28 days and involves changes in
structure and function of reproductive system.
• MENSTURAL CYCLE: In females the reproductive cycle completes
in 28 days and involves changes in structure and function of
reproductive system is called MENSTURAL CYCLE.

3. •FOUR PHASES OF MENSTURAL CYCLE:
• The events of menstrual cycle involves Ovaries (ovarian cycle) and
Uterus (uterine cycle) both are controlled by the Pituitary
Gonadotrophin hormones.
• Primary Steps in Female Reproductive Cycle are:
•1) RELEASE OF FSH ONSET OF PUBERTY:
Onset of puberty Pituitary releases FSH to stimulate production of PRIMARY
FOLLICLES.
Out of many only one Follicle continue to grow with one primary oocyte and rest of
the follicles degenerate and result in follicle atresia (Follicular atresia is the
breakdown of the ovarian follicles).

4. •2. PRODUCTION OF ESTROGEN:
• Under influence of FSH ovary releases Estrogen and this stimulates
the wall of the uterus (ENDOMETRIUM) to become vascularize and
ready for pregnancy
• Estrogen once released inhibit further secretion of FSH from pituitary.
•3. SECRETION OF LH :
• Decrease in FSH and increase in ESTROGEN cause release of
LH from pituitary and LH then stimulate ovulation (release of
secondary oocyte from mature follicle).

5. •4. CORPUS LUTEUM: After release of egg the follicle modify
into a special structure called Corpus luteum.
• Corpus luteum is Yellowish structure which secrets the hormone
Progesterone which stimulates more vascularization of endometrium
and make suitable for conceiving pregnancy.
•5. MENSTURATION: If fertilization does not occurs then slowly
the corpus luteum starts degenerating and hence level of progesterone
starts dropping in female body.
• And it’s effect on spongy endometrium starts decreasing and
endometrium starts breaking down causing discharge of blood and cell
debris called Menstruation and it lasts for 3-7 days.