Menstrual cycle patterns

Irregular ovulation is one of the primary Rotterdam criteria for PCOS.

How would you describe your menstrual cycles?

Regular

Cycles every 21–35 days, fairly consistent

Irregular

Cycles outside 21–35 days, or highly variable

Very irregular or absent

Cycles longer than 45 days, or fewer than 8 per year

In the past 12 months, how many periods did you miss entirely?

None

1–2 periods

3 or more periods

This screening tool is for informational purposes only and does not constitute a medical diagnosis.