Find out the likely date your baby was conceived. Calculate backwards from your due date, last menstrual period, or how many weeks pregnant you are now.
Because sperm can survive 3–5 days inside the body and an egg lives only 12–24 hours, conception could have occurred on any of these days — not just on the single predicted date.
The conception date is estimated by subtracting 266 days (38 weeks) from your due date — or by adding 14 days to the first day of your last menstrual period. These methods give the most likely conception date, but because ovulation timing varies, conception could have occurred within a 5–7 day window around this date.
Medically, it is impossible to determine the exact date of conception through calendar calculation alone. Sperm can survive 3–5 days in the female reproductive tract, so conception may have occurred several days before ovulation. An early ultrasound can narrow the window but cannot pinpoint a single day.
Important for Pakistani families: The conception date calculator is often used to understand the timeline of pregnancy, confirm paternity windows medically, or simply satisfy curiosity about the special moment a new life began. Results from this tool are estimates and should not be used for legal or medical determinations — always consult a qualified doctor.