A member asked:

I found out 6/21st i was pregnant went 6/27th and the ultrasound tech told me my sac was measuring 6 weeks she puts me at 5 weeks. when did i conceive?

A doctor has provided 1 answer

Pregnancy dating...: Pregnancy dating starts a pregnancy at the start of the last menstrual period, which is about 2 weeks prior to conception. Thus, if an ultrasound dating estimate is "5 weeks pregnant", then the conception estimate is "3 weeks ago" plus or minus one week. Dates are estimates. I'll say that again, "Dates are estimates." An ultrasound scan at 8-11 weeks can give a more accurate estimate.

Answered 11/28/2017

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Thank

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