A member asked:

First day of last period says i should be 9wks pregnant but sonogram says i'm just 6wks can c sac nothing else hgc levels rising. is something wrong?

A doctor has provided 1 answer

Wrong dates: A first trimester scan that is more than 1 week off in dates usually means the original dates were wrong. Ultrasound often cannot detect a fetus in a gestational sac until about 7 weeks or an HCG level >1500 or 2000. Be patient.

Answered 6/10/2014

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