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  • 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)


  • Gardener’s Text Book of ART 5th Edition Page 676
  • Clinical Endocrinology 1991
  • Human Reproduction update 2014; 20(3): 334-52