A member asked:

If you are measuring 21cm when doctors do the pubic bone to cervix thing. how far along are you really??

A doctor has provided 1 answer

Estimate: That measurement is a very rough estimate of gestational age. That measurement would point to somewhere around 20-22 weeks. Ultrasound and last menstrual period dating are often more accurate.

Answered 8/20/2014

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How is bone density tested? How do doctors measure bone density?

A doctor has provided 1 answer