Calculate delivery dates based on conception or LMP.
Due date = LMP + 280 days, or conception date + 266 days.
Conception on February 1 gives an estimated due date around October 29.
Add 266 days to the conception date for an estimated due date, which is often more accurate than the LMP method.
It is an estimate; most births occur within two weeks of the due date. First-trimester ultrasound improves accuracy.
No. Confirm your due date with your healthcare provider, who may adjust it based on ultrasound.
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