What does an antral follicle count mean?

What does the evidence say about antral follicle count?

1. AFC counts a defined group of small visible follicles, not the entire ovarian egg supply. It is commonly assessed by transvaginal ultrasound early in the cycle. Ask whether the report gives a total for both ovaries and how the clinic uses that count in planning. 1
2. A transvaginal scan uses a covered probe placed in the vagina to image the pelvic organs. The examination does not involve X-rays. Tell the service about pain, accessibility needs, or a difficult past pelvic examination so it can discuss support before the scan. 2
3. Ovarian-reserve testing is an adjunct to fertility evaluation. A low count can suggest a lower response to stimulation, but it does not establish an inability to conceive. Tubal passage, ovulation, sperm findings when relevant, and age remain part of the broader assessment. 3
4. AMH and AFC provide related information and can sometimes disagree. Using several markers does not consistently improve prediction over a well-interpreted individual test. Ask how a discrepancy would affect the actual plan rather than assuming every difference requires another round of testing. 1
5. For egg-freezing decisions, reserve markers can help estimate the number of eggs that might be obtained, while age and other factors affect later outcomes. A promising count does not guarantee that enough eggs will mature, survive warming, fertilize, or lead to a live birth. 4

How should you discuss an antral follicle count?

• Before the scan, confirm cycle timing and the clinical question.
• At result review, distinguish the visible-follicle count from an exact egg inventory.
• During fertility planning, combine the count with age, other findings, and any observed response to medicines.

Questions for your fertility or prenatal team