A member asked:

Why do yall add two weeks to due date ? . its saying im 5 weeks & 2 days . does that means that in reality im really 3 weeks & 2 days . ?

2 doctors weighed in across 2 answers
Dr. Steven McCornack answered

Specializes in Anesthesiology

Most estimates of due dates assume that the pregnancy is normal and will last 40 weeks. These are estimates worked out from many years of experience and millions of births

Answered 5/28/2021

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It is an outdated convention. The full 40 week term is considered to start on the first day of a woman’s last menstrual period (this is a tangible date which is presumably two weeks prior to ovulation and conception). If you are “5 weeks” pregnant, the embryo was conceived 3 weeks ago.

Answered 5/28/2021

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