🌸Ovulation Calculator
Typical: 21–35 days
The ovulation calculator predicts when ovulation is most likely to occur and identifies the fertile window — the days when conception is possible. Ovulation typically occurs 14 days before the next expected period. The fertile window spans 5 days before ovulation, the day of ovulation, and 1 day after, as sperm can survive up to 5 days in the reproductive tract.
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Tip: For accurate prediction, track basal body temperature (BBT) and cervical mucus changes. BBT rises 0.2–0.5°C after ovulation. An LH surge (detected by ovulation predictor kits) typically precedes ovulation by 24–36 hours.
- 1Ovulation day estimate = LMP + (cycle length − 14 days)
- 2Fertile window = 5 days before ovulation to 1 day after
- 3Egg is viable for 12–24 hours after ovulation
- 4Sperm can survive 3–5 days in the reproductive tract
LMP = 1 Jan, 28-day cycle=Ovulation ≈ 14 Jan, fertile window 9–15 Jan
LMP = 1 Jan, 32-day cycle=Ovulation ≈ 18 Jan, fertile window 13–19 Jan
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