Ovulation Calculator
Predict approximate ovulation as LMP + (your cycle − 14 days) — a textbook calendar method that assumes predictable ovulation around two weeks before the next period.
Select your LMP to compute.
Important usage notes & limitations
Reproductive timelines interact with contraception cessation, PCOS phenotype, transgender hormone therapy intensity, low body-fat athletic amenorrhea, and perimenopause. Hormonal contraception intentionally suppresses natural ovulatory signals until washout stabilization — calendar methods become meaningful only once cycles resume reliably.
See also: Pregnancy Due Date Calculator · Women's health calculators hub.