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Menstrual Cycle Part -2

Female Reproductive System

The Female Reproductive system consists of:

  • Primary sex organ i.e. a pair of ovaries(Produces female gametes called ova)

  • Secondary sex organs i.e. a pair of fallopian tubes (oviducts) , a uterus (womb), a vagina.  

Hormonal Control of MC

  • FSH stimulates the ovarian follicles to produce oestrogens.

  • LH stimulates corpus luteum to secrete progestrone.

  • Menstrual phase is caused by the increased production of oestrogens.

  • LH causes ovulation

  • Proliferative phase is caused by the increased production of oestrogens.

  • Secretory phase is caused by increased production of progestrone.

Menopause

  • Phase in women’s life when ovulation & menstruation stop.

  • Occurs between 45-55 years of age.

Cause:

  • Theory1- As a result of changes in pituitary gland & hypothalamus.

  • Theory2- Decline in oestrogen & progestrone level.

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