2 weeks before conception
2 weeks before conception
Out of context: Reply #29
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"Since it's not always possible to determine the exact date of conception, most due date calculators, such as this one, are based on a gestational period of 40 weeks from the first day of a woman's last menstrual period (LMP). This assumes a woman ovulates and conceives exactly two weeks after the first day of her LMP and carries the baby for 38 weeks. The problem is, of course, that this is an estimate, and 40 weeks is only an average term of pregnancy."