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Please help, how accurate are first trimester ultrasound and how many days are they usullly off? How accurate are 1st trimester ultrasounds. I'm trying to figure out if I should keep my baby or move forward with getting a abortion. After my ultrasound i

1 doctor weighed in
Dr. Robert Andrews
Radiology - Interventional

In brief: First

First trimester ultrasounds are accurate to within a few days.
They are more accurate than an estimate based on your last period, especially if you aren't sure when that period was.

In brief: First

First trimester ultrasounds are accurate to within a few days.
They are more accurate than an estimate based on your last period, especially if you aren't sure when that period was.
Dr. Robert Andrews
Dr. Robert Andrews
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