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How accurate are sonograms?

How accurate are sonograms? Do they give the most accurate due date if I am not sure of the exact date of my last period?
4 Responses
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719902 tn?1334165183
Yep, they are quite accurate.  I did not know my LMP because I got pregnant right after a m/c.  A sonogram was my only way of estimating my due date.  I had a sono at 8 weeks, 12, and 20, and my due date has remained within 3-5 days.
Helpful - 0
342988 tn?1299782356
very accurate.  mine was to a T.
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280369 tn?1316702041
I agree with amberd..in the first trimester, it is very accurate!
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210400 tn?1325380570
Ultrasounds in early pregnancy are very accurate at dating. Good luck!
Helpful - 0

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