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Re: 10 w 4 day ultrasound from lmpFrom: William F. von Almen, II, MD, FACOG (anonymous@obgyn.net)Wed, 5 Dec 2001 12:39:30 -0600 (CST)
At Wed, 5 Dec 2001, Carla wrote: > >Hi , I am 10w4days from lmp. Could you please tell me that if my baby >measured 10w3days on ultrasound dating back to May 24th, 2001, between >what dates did I conceive, taking into account margin of error of baby's >growth and margin of error for technician measuring as well? (My >ultrasound says CRL 30mm which according to charts is 9w6days which >dates to 28th May but my ultrasound specifically states 10w3days next to >the crl measurement so we will stick with that.) Carla I am confused by your ?. A first trimester ultrasound has a +/- 5 days validity as far as dating goes. Hope this helps.
-- William F. von Almen, II, MD, FACOG Chairman, Editorial Advisory Board Pregnancy and Birth Section Private Practice New Orleans, La.
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