PREGNANCY-BIRTH Messages for February, 2002: Re: 6 wks5dayslmp ultrasound

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Re: 6 wks5dayslmp ultrasound

From: anonymous@obgyn.net
Thu, 7 Feb 2002 20:00:11 -0600 (CST)

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In reply to: Carla: "6 wks5dayslmp ultrasound"

At Thu, 7 Feb 2002, Carla wrote: >
>Hi, had an ultrasound at 6wks5days from very light lmp (thought
>something was wrong) well, the ultrasound came up with crl measurement
>of 9.3mm and 7wks1day. Looking at the ultrasound photo I notice that at
>the crown the measurement seems to have missed a little bit of the fetus
>and I am thinking there may be a discrepancy by 2 or 3 mm. Wondering
>what kind of margin of error I can use here to take into account this
>possible error in measurement. The ultrasound photo states +\-4 days
>but I am thinking I should add to that?

The +/- 4 days is about right and takes into account measurement errors and also variations in growth.

-- R. Daniel Braun, MD FACOG FOG

All those things that were in my signature statement until it disappeared a short while ago.

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