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A member asked:

Could conception occur outside of the +/- 1 week margin of error based on the ultrasound?

A doctor has provided 1 answer
Dr. Gerard Honore answered

Specializes in Fertility Medicine

Yes if: 1) the pregnancy's abnormal and hence not the correct size, 2) the sonographer mismeasured or miscalculated. Otherwise, not really.

Dr Samuel and 2 doctors agreed

Answered 4/7/2014

5.2k views

Thank

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Based on an ultrasound at 9 weeks how can I estimate my ovulation/conception date?

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I had a transvaginal ultrasound on 14 sept 2012. The doctor told me I am 7 weeks 1 d. Based off of this when is my most likely date of conception?

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