Ultrasound is one of the criteria for the diagnosis of polycystic ovarian syndrome (PCOS).
Polycystic ovaries are detected by TVS (Trans vaginal sonography) in approximately 75% of women with clinical diagnosis of PCOS (1).
TVS is a highly sensitive test for identification of Polycystic ovaries.
Antral follicles are small follicles in the ovary ranging in size from 2-9 mm and grow over 10-12days in a menstrual cycle to select one dominant follicle which matures and releases the ovum.
An AFC(Antral follicular count) of more than 12 in one or both ovaries of size 2-9mm arranged either peripherally or diffusely with a dense increased Volume of ovarian stroma.(2)
Ovarian volume of greater than 10cm3 with no follicles measuring over 10mm in diameter is considered as PCOS.
Recent guideline say AFC >25 in one or both ovaries is considered as USG criteria of PCOS.(3)
