According to the original Rotterdam 2003 consensus, polycystic ovarian morphology on transvaginal ultrasound requires which finding in ONE ovary?

• A A single dominant follicle exceeding 18 mm with stromal hyperechogenicity
• B 20 or more follicles measuring 2 to 9 mm, regardless of volume
• C Ovarian volume greater than 20 mL with any follicle count
• D 12 or more follicles measuring 2 to 9 mm, or ovarian volume greater than 10 mL ✓

Explanation

The Rotterdam consensus defined polycystic ovaries as 12 or more follicles of 2 to 9 mm diameter and/or ovarian volume above 10 mL in at least one ovary, excluding corpora lutea or cysts. Option B reflects the 2018 international guideline update, which raised the follicle threshold to 20 when using transducers of 8 MHz or higher frequency, so it does not answer the 2003 criterion asked. Volume over 20 mL is far above the accepted cutoff.

Reference: Williams Gynecology, 4th ed.

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Written and medically reviewed by the StethoPrep medical team.