Pregnancy: Ages 25-34 Community
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Avatar universal

Due date

I'm pregnant for the first time :) my question is..when the doctor determines how far along you are from the first ultrasound does it normally line up from your last missed period or a couple weeks later when you would have been ovulating?
2 Responses
134578 tn?1546634665
From the first day of your last period.  Not from when you would have been ovulating.  From day 1 of bleeding of the last period you had before getting pregnant.  All medical counts use day 1 of bleeding as the start point for a pregnancy.  If your cycles are irregular, the ultrasound's computer will compute the start point by looking at the size of the embryo, but will still count back the two weeks from the assumed conception, to get to the average day 1 of last period.
Avatar universal
Okay. Thank you so much!
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