How far off can a first ultrasound be?

Question

Answer

It's the most accurate, usually not off by more than a few days, however most women also think  EDD is a completely accurate timeline of when they will have their baby. So it's most accurate in terms of development, but it none are going to predict the actual date of birth accurately necessarily. Some women naturally gestate longer and ftm statistically go to 41w not 40w.

Answer

My first was out by a week and a half! When I went back two weeks later the baby measured how it should've been

Answer

Not very many options. 12 weeks.

How far off can a first ultrasound be?

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