How accurate is an ultrasound performed during first trimester?
Question by bookworm021:
I am just wondering the accuracy of an ultrasound done during the first 12 weeks of pregnancy. I had one done and was told I am 8 weeks pregnant. What is the margin of error? I have heard 3 days either way, but I am not sure.
Is there any way the ultrasound could be off my 2 or 3 weeks?
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