A member asked:

I had a early scan they said i was about 6 weeks pregnant, could this possibly be out by about 10 days because it doesn't work out with my dates.?

A doctor has provided 1 answer

Probably not: Early first trimester scans are very accurate (usually within a day or two) for dating pregnancies. Keep in mind that if an ultrasound says you are 6 weeks 0 days, that means the conception occurred approximately 4 weeeks 0 days ago assuming a 28 day cycle and ovulation on day 14. 6 weeks should correlate with the first day of the last menstrual period, not the conception event.

Answered 5/15/2015

4.1k views

Thank

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