Conception Date Calculator

Conception typically occurs on or very near ovulation day — about 14 days before your next expected period. For a 28-day cycle that started March 1, ovulation (and likely conception) would have been around March 15.

Not necessarily. Sperm can survive 3-5 days in the reproductive tract, so intercourse up to 5 days before ovulation can result in conception. The actual fertilization may occur days after the intercourse that led to pregnancy.

Gestational age is counted from the first day of your last period, not conception. Since ovulation occurs about 2 weeks after your period starts, you're already '2 weeks pregnant' at conception by medical dating.