Due Date November 24: When Did You Conceive?
Wondering when your November 24 baby was conceived? Using the standard 266-day rule, the answer is most likely March 3, give or take a few days.
Key dates for a November 24 due date
| Most likely conception date | March 3 |
|---|---|
| Likely conception window | February 28 – March 6 |
| Days when sex could have led to pregnancy | February 26 – March 4 |
| Estimated first day of last period | February 17 |
| Positive home test likely from | March 17 (around the missed period) |
| Second trimester begins (14 weeks) | May 26 |
| Third trimester begins (28 weeks) | September 1 |
| Full term begins (39 weeks) | November 17 |
How the conception date is calculated
Due dates are normally counted as 280 days (40 weeks) from the first day of the last menstrual period. In a typical 28-day cycle, ovulation and conception happen about two weeks after that period starts, so conception sits roughly 266 days before the due date. Subtracting 266 days from November 24 gives March 3.
Sperm can survive in the reproductive tract for up to five days, while an egg lives for about 12 to 24 hours after ovulation. That means sex several days before ovulation can still lead to pregnancy.
How certain is this date?
Remember that a due date is only the midpoint of a range. Ovulation timing varies from cycle to cycle, so the true conception day can sit a few days away from the estimate.
If your cycles are usually longer than 28 days, conception probably happened a little later than March 3; with shorter cycles, a little earlier. A cycle that is 32 days long, for example, shifts the likely date about four days later.
Check your own dates
Enter your exact due date in the conception date calculator to see these results with weekdays and the correct year, or start from your last period with the last-period conception calculator.
Conception Date Calculator: Find the most likely conception date from your due date.
Open the calculatorThis article is general information, not medical advice. Talk to a doctor or midwife about your own pregnancy or fertility.