A member asked:

Does gestational age achieved from an early ultrasound assume ovulation occured around cd 14?

A doctor has provided 1 answer
Dr. Gerard Honore answered

Specializes in Fertility Medicine

In a way: First trimester ultrasound is based on measurements only, which is extremely reliable. No assumption need be made. The ega is reported from the first day of a hypothetical last menstrual period; so in that regard it 'assumes' conception on cd 14.

Answered 9/22/2012

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