Unformatted text preview: • Corpus Luteum produces progesterone mainly but continues to secrete small amounts of estrogen o Progesterone completes and maintains uterine lining. In the absence of pregnancy progesterone inhibits LH When progesterone inhibits LH… • Corpus Luteum disintegrates • No progesterone produced • Uterine lining sloughs off • FHS no longer inhibited so a new cycle begins Birth Control Pills suppress FSH from the beginning so that no follicle ripens Not a lot of luteual scars suggests that a woman isn’t ovulating every month Fertility pills block estrogen receptor sites on the hypothalamus thereby preventing estrogen from shutting down FSH which allows follicles to ripen more and more If pregnancy occurs, the placenta releases hormomes that keep the corpus luteum from disintegrating o •...
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- Spring '08
- Biology, progesterone, corpus luteum, estrogen, Ovulation