A member asked:

I went for ips 1and i was 13 wks 3 days by lmp. the tech said i am 14 weeks 2 days on ultrasound, so they can't do nuchal translucency. is it by lmp ?

A doctor has provided 1 answer

By sonogram: Nuchal translucency measurements are usually base on sonographic measurements of fetal crown rump length measurements giving a gestational age between 10 to 14 weeks. The cutoff is usually 14 weeks by sono. However, in a high risk population, the measurements remains fairly constant and may be done at any time.

Answered 10/29/2018

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