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A member asked:

How accurate are the charts with crown rump fetus measurements? what does it mean being in the 5th, 50th and 95th percentile?

A doctor has provided 1 answer
Dr. Gregory Hines answered

Specializes in Family Medicine

Very accurate: Those charts are compilations of hundreds of thousands of data points, and are generally fairly accurate. Those percentiles are for averaged norms at those levels.

Answered 3/2/2013

5.3k views

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Related Questions

A member asked:

Isn't a 12 wk u/s accurate within 5-7 days? Don't the fetus measurements vary slightly and would show a difference of 11 days?

A doctor has provided 1 answer

A member asked:

U/s on 1/20/14 gave measurement of 11w4d measuring the fetus at 4.8 cm. Could 11/25/13 be conception date? What is the accurate conception date?

A doctor has provided 1 answer

A member asked:

Should the baby's crown to rump measurement in early pregnancy date back to your period or to conception? If baby was 7mm, 6w5d, when was conception?

A doctor has provided 1 answer

A member asked:

Findings on Ultrasound: Mean Sac Diameter: 2.9 Crown to rump length: 0.7 Yolk sac: 0.4 Heartbeat: Not visualized Estimated Ultrasound age based off of CRL is 6 weeks 4 days Last period was end of August. Is this necessarily a miscarriage?

A doctor has provided 1 answer

A member asked:

What fetal measurement on ultrasound holds accuracy the longest in pregnancy?

A doctor has provided 1 answer

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