Ovulation Calculator

• Moderately accurate for regular cycles.

• Less reliable for irregular cycles (track basal body temperature or LH tests for precision).

• Best paired with ovulation predictor kits (OPKs) or cervical mucus monitoring.

• Ovulation day: The single day an egg is released (~24-hour lifespan).

• Fertile window: The 5–6 days leading up to ovulation (sperm can survive 3–5 days in the reproductive tract).

Yes, but not foolproof. The fertile window indicates higher conception risk, but:

• Sperm survival varies.

• Ovulation can shift due to stress/illness.

• Combine with barrier methods for better protection.

• Track 3+ cycles to identify patterns.

• Use secondary signs:

  • Cervical mucus (egg-white consistency = fertile).

  • Basal body temperature (BBT) spike post-ovulation.

  • LH surge (detected by OPKs).

Signs include:

• Mild pelvic pain (mittelschmerz).

• Increased libido.

• Breast tenderness.

• Positive OPK test.

No! It depends on cycle length:

• 21-day cycle: ~Day 7.

• 35-day cycle: ~Day 21.
  The calculator adjusts for your unique cycle.

Yes. Stress, illness, or travel can:

• Postpone ovulation.

• Shorten/lengthen your cycle.
  This is why tracking symptoms improves accuracy.

The 3 days before ovulation (sperm survival maximizes chances). Example:

• Ovulation = Day 14.

• Best days = Days 11–13.

Yes! They detect the LH surge (24–36 hours before ovulation), confirming your fertile window.

• 20s–early 30s: Regular ovulation.

• Late 30s–40s: Fewer viable eggs, irregular cycles.

• Menopause: Ovulation stops.

Causes include:

• PCOS.

• Thyroid disorders.

• Extreme weight loss/gain.
  See a doctor if cycles are >35 days or absent.

Yes:

• Clomid induces ovulation.

• Birth control suppresses it.

• Antidepressants/steroids may disrupt cycles.

• Implantation occurs 6–12 days post-ovulation.

• Pregnancy tests work ~10–14 days after ovulation.