Accurately predict your ovulation days, fertile window, and best conception dates based on your menstrual cycle data. Plan your journey to parenthood with confidence.
Based on established clinical obstetrics and gynecology principles
The luteal phase (post-ovulation) is remarkably consistent at ~14 days across all women. This is the basis for all ovulation calculations.
Ovulation occurs 14 days BEFORE your next expected period. For a 28-day cycle, that's Day 14. For a 30-day cycle, it's Day 16.
Sperm can survive in the female reproductive tract for up to 5 days. Combined with egg viability of 12–24 hours, this creates a ~6–7 day fertile window.
All calculations follow established clinical guidelines for ovulation prediction.