The Menstrual (Uterine) Cycle
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20.7.06
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- Proliferative phase of Uterine Cycle (days 6-14)
- rising levels of estrogen allow "repair" of stratum basalis of the endometrium; also causes thickening of stratum functionalis, increasing vasculature, making progesterone receptors
- Secretory phase of Uterine Cycle (days 15-28)
- rising levels of progesterone (from corpus luteum) increase thickness and vasculature to the endometrium
- Menstrual phase of Uterine Cycle (days 1-5)
- NO PREGNANCY -------> no Human Chorionic Gonadotropin -------> no more progesterone (corpus luteum gone) -------> endometrium “sloughs off” and bleeding occurs
Tags: Reproduction, Menstruation
Category: Physiology Notes
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