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Fertility Glossary

Antral follicle count (AFC)

Antral follicle count — an ultrasound-based estimate of ovarian reserve.

Fertility testing

Counted early in the menstrual cycle on transvaginal ultrasound, AFC reflects the current pool of resting follicles.

Also known as: AFC, follicle count

Related United Kingdom guides

Last reviewed: 23 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.

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