label: Abnormal antral follicle count
label_lc: abnormal antral follicle count
description: "Any deviation from a count of antral follicles that is normal for age. Antral follicles appear as small fluid-filled sacs that contain an immature egg. Antral follicle count can be measured (usually on day 2-5 of the menstrual cycle) by transvaginal ultrasound. The number of antral follicles may reflect ovarian reserve."