The Female Reproductive Cycle

The Female Reproductive Cycle - The Female Reproductive...

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The Female Reproductive Cycle 1) uterine cycle (menstrual cycle) 2) ovarian cycle: follicular, ovulation, luteal The ovarian cycle begins with the release forom the hypothalamus of GnRH, which stimulates the anterior pituitary to secrete small amounts of FSH and LH. In the follicular phase, FSH stimulates follicular growth, and the cells of the follicle secrete estrogen. The slow rise in estrogen inhibits the release of FSH and LH. When the secretion of estrogen by the growing follicle rises sharply, the hypothalamus is stimulated to increase GnRH otput, which result in a rise in LH and FSH release. The increase in LH induces maturation of the follicle, which enlarges and forms a bulge near the ovary surface. Ovulation occurs about a day after the LH surge, with the rupture of the follicle and adjacent ovary wall. In the luteal phase, LH stimulates the transformation of the ruptured follicle to form the corpus luteum, which secretes estrogen and progesterone. The rising level of these
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This note was uploaded on 03/30/2010 for the course BSC BSC2011 taught by Professor Evans during the Spring '10 term at École Normale Supérieure.

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The Female Reproductive Cycle - The Female Reproductive...

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