A member asked:

Hi doctors if my baby was 2.5 mm january 4, 2012 then i guaranteed conceived in december not november? appreciate your help,

A doctor has provided 1 answer
Dr. Joseph Accurso answered

Specializes in Radiology

If crown rump: Length was 2.5 mm, then embryo menstrual age (time since first day of last period) was approximately 5 weeks 5 days, +/- 8% or 3 days. Date of conception was approximately 2 weeks later (assuming a 28 day menstrual cycle).

Answered 7/28/2013

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Thank

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