USMLE Step 2 CK Lecture Notes 2019: Obstetrics/Gynecology (Kaplan Test Prep)

NOTE

Accuracy of Sonogram Dating

Crown-Rump  Length  (CRL)

+/- 5   days <9 weeks

+/- 7   days 9-14   weeks

BPD,    HC, AC, FL

+/- 7   days 14-16  weeks

+/- 10  days 16-22  weeks

+/- 14  days 22-28  weeks

+/- 21  days 28+    weeks

http://ebookobgyne.net

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