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A member asked:

How are conception dates determined from transvaginal ultrasound?

3 doctors weighed in across 2 answers
Dr. Jay Bradley answered

Specializes in Cornea, Cataract, & Refractive (LASIK & PRK) Surgery

Baby size: Dates are based on size measurements of baby and back calculated.

Answered 12/2/2012

5.5k views

Thank

Due dates: Transvaginal ultrasounds early in pregnancy measure the crown to rump length of the fetus. It is a very accurate measure of the progress of the pregnancy and importantly, when will you be 40weeks.

Dr Rothman agreed

Answered 12/9/2013

5.5k views

Thank

Related Questions

A member asked:

I had a transvaginal ultrasound on 11 june 2012. The doctor told me I am 6 weeks 3 d. Based off of this when is my most likely date of conception?

A doctor has provided 1 answer

A member asked:

How accurate are transvaginal ultrasounds in dating conception date if have irregular periods?

10 doctors weighed in across 4 answers

A member asked:

So would a transvaginal untrasound dating me at 7 weeks 3 days be early rather than late in guessing the date of conception?

A doctor has provided 1 answer

A member asked:

Can you tell me how precise is a transvaginal untrasound at determining conception and due date?

A doctor has provided 1 answer

A member asked:

Have had 2 transvaginal ultrasounds. Due date has changed twice. Due date is now 5/1/16. LMP was 7/12/15. Confused on conseption date??

A doctor has provided 1 answer

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