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Fertility Glossary

Antral follicle

A small, fluid-filled follicle visible on ultrasound early in the cycle.

IVF & treatment

Antral follicles are counted to estimate ovarian reserve (the AFC). Each can potentially grow in response to stimulation.

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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