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A member asked:
So if 19 week ultrasound is off by +/-2 weeks. is that added to the already 19 weeks 6 days? so you add to the 19 weeks and also minus from the 19 weeks
A doctor has provided 1 answer
It's a range.: It might be anywhere between 17 weeks 6 days and 21 weeks 6 days. Fetal biometry is a complex calculation that takes into account the size of the baby's head, abdomen and femur length.
Answered 10/6/2016
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