Estimate your fertile window and ovulation dates based on your menstrual cycle. Understand how cycle regularity or PCOS affects fertility timing and preparation.
Three simple inputs to calculate your estimated fertile days. No registration or sensitive data required.
Calculated for a 28-day regular cycle starting on .
Color-coded calendar showing your fertile days and ovulation timing.
Calendar calculations are estimates based on an assumed 14-day luteal phase. An online score or calendar estimate does not confirm clinical ovulation.
Standard calculators assume a woman ovulates exactly 14 days before her next bleeding episode. In PCOS, hormonal imbalances (such as elevated LH and androgens) disrupt normal follicular recruitment. As a result, ovulation may be delayed (oligo-ovulation) or entirely absent (anovulation), making fixed math unrepresentative.
Clear, medically grounded insights to help you navigate fertility planning.
Ovulation is the release of a mature egg from an ovarian follicle. Once released, the unfertilized egg survives for approximately 12 to 24 hours. Because sperm can survive in cervical fluid for up to 5 days, your fertile window spans 6 days: the 5 days before ovulation and the day of ovulation itself.
Polycystic Ovary Syndrome (PCOS) involves a hormonal imbalance where ovaries produce higher-than-usual androgens and experience altered LH/FSH signals. Ovarian follicles often stall before reaching full maturity, resulting in delayed ovulation (oligo-ovulation) or cycles without ovulation (anovulation).
Beyond calendar estimates, you can monitor biological indicators:
Schedule a clinical consultation if you have periods spaced further than 35 days apart, notice absent cycles, or have been trying to conceive for 12 months (or 6 months if over 35). With diagnosed PCOS, seeking specialist guidance earlier can help tailor lifestyle, metabolic, and medical approaches.
PCOS and irregular cycles can make fertility planning more challenging. A personalized consultation with Dr. Shabnam Sharjil can help you evaluate your hormonal patterns and understand your options.
