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What happens during the follicular phase of the menstrual cycle?

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�Two hormones, follicle stimulating hormone (FSH) and luteinizing hormone (LH), are released

�The hormones stimulate the growth of about 15 to 20 eggs in the ovaries, each in its own "shell," called a follicle.

�FSH and LH also trigger an increase in the production of the female hormone estrogen.

�As estrogen levels rise, like a switch, it turns off the production of follicle-stimulating hormone.

�One follicle in one ovary continues to mature. This dominant follicle suppresses all of the other follicles in the group.

SOURCES:
National Institutes of Health.
The Merck Manual.
American Society of Reproductive Medicine.

Reviewed by Traci C. Johnson on December 12, 2018

SOURCES:
National Institutes of Health.
The Merck Manual.
American Society of Reproductive Medicine.

Reviewed by Traci C. Johnson on December 12, 2018

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What happens during the ovulatory phase of the menstrual cycle?

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