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Understanding First Trimester Ultrasound Accuracy & Baby Development


Question
Hi dorothy,thank you for answer and your time.I'm somewhat satisfied.keep up the goodwork.

Answer
You're welcome!

Ultrasounds only take into effect the size and development of the baby - the aren't going by your LMP.  And embryos grow at very specific  rates, which is why 1st trimester ultrasounds are so accurate.  I know it's hard not to worry, but medically, speaking, there is no way that the ultrasound would be off by that much.