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A member asked:
After the 6th or 7th week of pregnancy does the fetus double in size, causing the gestational age to be off?
A doctor has provided 1 answer
Early pregnancy: The rate of growth of the fetus in the first trimester is very rapid. An ultrasound in the first trimester has only a 3-6 day error while later in pregnancy that error grows to 3 weeks. The gestational age is more accurate in early pregnancy and less likely to be off in the first trimester.
Answered 1/9/2013
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