Table 1.

Diagnostic criteria for polycystic ovary syndrome

Rotterdam criteria (2 out of 3)3	International evidence-based guideline (2 out of 3 except adolescents)4
1. Oligo- and/or anovulation*	1. Oligo- and/or anovulation*
	Irregular menstrual cycles are defined as follows:
	• Normal in the first year post-menarche as part of the pubertal transition
	• 1 to < 3 years post-menarche: < 21 or > 45 days
	• 3 years post-menarche to perimenopause: < 21 or > 35 days or < 8 cycles per year
	• 1 year post-menarche > 90 days for any one cycle
	• Primary amenorrhea by age 15 or > 3 years post-thelarche
2. Clinical and/or biochemical signs of hyperandrogenism*	2. Clinical and/or biochemical signs of hyperandrogenism*
3. Polycystic ovary morphology	3. Either polycystic ovary morphology on ultrasound or elevated serum anti-Müllerian hormone Ultrasound criteria or anti-Müllerian hormone should not be used for the diagnosis of PCOS in those with a gynecological age of < 8 years ( < 8 years after menarche)

*Provided other causes are excluded.

PCOS, polycystic ovary syndrome.