I am a Registered Midwife, so reading OB US reports is a daily activity for me... Please can anyone explain to me how the estimated fetal weight is 97%ile when all of the biometry measurements are lower than that? Math is not my strong suit but this does not make sense to me, and I see it regularly. What kind of magical calculation is happening here?? Thanks!
Example:
BPD 88 mm = 35 wks 6 days 76 %
HC 320 mm = 34 wks 6 days 60 %
AC 334 mm 37 wks 3 days 94 %
FL 69 mm 37 wks 0 days 91 %
EFW 2996 g = 39 wks 2 days 97 %
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source https://www.reddit.com/r/Radiology/comments/uo4c3z/drop_some_radiology_knowledge_for_a_maternity/
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