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Illustration of the blood levels of various hormones during the menstrual cycle


Illustration of the blood levels of various hormones during the menstrual cycle

Illustration of the blood levels of various hormones during the menstrual cycle

Follicle-stimulating hormone (FSH) stimulates the ovarian follicles to develop and produce estrogens. The level of estrogens rises to a peak just before the luteinizing hormone (LH) surge. Ovulation normally occurs 24 to 36 hours after the LH surge. If fertilization does not occur, the blood levels of circulating estrogens and progesterone fall. This hormone withdrawal causes the endometrium to regress and menstruation to start again
Rainy Cloud's picture
by
السنة الخامسة

The Estrogen surge stimulates LH and inhibits FSH
So how the OCP " oral contraceptive " works???
OCP prevent estrogen surge => No LH surge => No ovulation
Hot sauce's picture
Hot sauce
طبيب مقيم

Quote:
If fertilization does not occur, the blood levels of circulating estrogens and progesterone fall

And If fertilization occurs, Estrogen will fall and progesterone still in a high level by "corpus luteum" which is stimulated by HCG from placenta Eye-wink

drferas's picture
drferas
السنة السادسة
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