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Antral Follicle Count


Updated January 20, 2010


Antral follicle count involves counting the resting follicles that are found on the ovary at the beginning of each menstrual cycle. They are approximately 2 – 8 mm in size. Can be an indication of the ovarian reserve of a woman.

A high antral follicle count indicates that a woman has a large number of eggs remaining in her ovary, and sometimes PCOS. Low antral follicle counts show the opposite, that a woman may have a reduced number of eggs and therefore reduced fertility. Doctors can determine the number of antral follicles through a transvaginal ultrasound.

Also Known As: AFC, primordial follicles, resting follicles
Common Misspellings: antrel follicle count
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