A member asked:

I had my period dec 16 had sex. can't remember if my period was normal on jan 9. i am now 26 weeks pregnant, are the ultrasounds accurate?

5 doctors weighed in across 2 answers

Yes: Sonograms highly accurate and better than memory.

Answered 10/18/2013

5k views

Thank

Ultrasound dating: It depends on the timing of ultrasound. First trimester ultrasound is accurate within 5-7 days. 2nd trimester ultrasound has accuracy of +/_ 2 weeks. Lmp dating also assumes a 28 day cycle. There is no test that can date conception more accurately than a 1 week window.

Answered 12/9/2013

5k views

Thank

Related Questions

Sponsored Content
HealthTap Medical Group does not endorse products or services. Sponsored content revenues support our mission to make health information free and accessible to all.Learn more