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Normal Ovaries on Ultrasound

No comments yet June 24th, 2019
Normal Ovaries on Ultrasound by Dr. Pankaj Talwar
  • There are two ovaries on each side of the uterus in the ovarian fossa. They are oval in shape and with a mean volume of aprox 4.9ml. The ovary often lies on the internal iliac artery and vein but does not maintain a consistent relationship with these vessels.
  • On baseline imaging ovaries are evaluated for normal expected findings and to screen any abnormality.
  • In the first half of the menstrual cycle (follicular phase) a normal ovary will demonstrate multiple Antral follicles which measures between 2-9 mm in maximum diameter, they are best evaluated on D2 or D3 of menstrual cycle. Normal AFC is 5-10 in each ovary, if AFC is < 4 combined in both ovaries it is decreased ovarian reserve. If AFC > 12 in any / either ovaries it indicates polycystic ovaries. Normal stromal blood flow velocity is 6-12cm/sec.
  • In a natural cycle a dominant follicle of size 17-24mm develops in one of the ovaries matures and releases the egg (ovum) during ovulation.
  • On color Doppler, flow velocity tends to increase at and immediately after ovulation.
  • After ovulation a corpus luteum is frequently seen during the second half of the menstrual cycle (secretory phase).
  • On power Doppler it appears like a ring of fire due to increased blood flow.
  • Corpus luteum appears as a round anechoic cystic mass with a homogenous, thick, moderately echogenic wall.

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