Fertility Glossary

Antral follicle count (AFC)

The number of small resting follicles counted on ultrasound.

The antral follicle count is performed by transvaginal ultrasound, usually early in the cycle. Together with AMH it guides the stimulation dose used in IVF.

Related terms

Transvaginal ultrasound

An internal scan using a slim probe placed in the vagina.

Ovarian reserve

The number of eggs remaining in the ovaries.

Follicle

A fluid-filled sac in the ovary containing an egg.

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