Fertility Calculator – Ovulation & Fertile Window Tracker

Ovulation typically occurs 14 days before the next period in a 28-day cycle. However, it can vary by ±2 days. Ovulation predictor kits (OPKs) detect the LH surge, providing more precise timing.

The fertile window is 5 days before ovulation plus ovulation day (6 days total). Sperm survives up to 5 days in the reproductive tract. The egg survives 12-24 hours after release.

Pregnancy can only occur if sperm meets the egg within 12-24 hours after ovulation. Sperm survival means conception is possible if intercourse occurs during the 5 days before ovulation too.

Yes. Longer cycles mean ovulation occurs later in the month. Irregular cycles make ovulation timing unpredictable. Use this calculator as a guide; track multiple cycles for accuracy.

Unlikely but possible in shorter cycles. If you ovulate very early (day 5-6), and sperm survives from intercourse on day 4-5, pregnancy could occur. Tracking is important for accuracy.

Physical signs: cervical mucus becomes clear and stretchy (like egg white), slight temperature rise (0.3-0.8°C), mild pain in the lower abdomen, and slight cervix position changes.

Every 2-3 days throughout the cycle ensures sperm is present. During the fertile window, daily or every-other-day intercourse maximizes conception chances.

Consult a specialist after 1 year of unprotected intercourse without conception (or 6 months if over age 35). Earlier consultation is wise if: irregular periods, known fertility issues, or age >40.