A member asked:

If a baby is 7 weeks old, does it mean it was conceived 5 weeks ago?

A doctor has provided 1 answer
Dr. James Ferguson answered

Specializes in Pediatrics

Baby or fetus?: It takes 40 weeks +/- to bring baby from conception to due date. Your stage is usually measured from your last menstrual flow will estimate conception 2 weeks after that date because that's when the egg is most likely to be fertilized. If your pregnancy is 7 weeks along, you conceived 7 weeks ago. Later in your pregnancy, the growth of the fetus & other measurements may suggest a different date.

Answered 12/20/2012

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