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Re: Nuchal Fold, Femur Length, Umbilical Cord

From: Harvey S. Marchbein, M.D. (anonymous@obgyn.net)
Mon, 25 Feb 2002 08:28:16 -0600 (CST)

At Sun, 24 Feb 2002, Ed wrote: >
>My wife is in the beginning of her 2nd trimester. During our last visit
>to the Gynae at 14 weeks, he took a measurement of our baby's nuchal
>fold and was initially concerned with what he perceived was the NT.
>After some searching and scanning using the colour doppler, he found it
>to contain blood movement (red on the left and blue on the right - he
>explained that that showed blood moving in a loop - towards the scanner
>on the left (red) and away from it on the right (blue) and that this
>showed that it is probably the umbilical cord looped behind the baby's
>neck; thus indicating a false thickness on the back of his neck).
>
>He then took a second NT measurement of 2.1mm and told us that it was
>fine. I have complete confidence in our gynae but his initial reaction
>gave us quite a shock and I have been reading up on Nuchal Fold
>Thickening ever since. He made no comment regarding the measurement of
>our baby's femur (i'm assuming that's the thigh bone) length though. My
>concerns however are:
>
>1. Do all foetuses have NT? If so, what is a 'normal' thickness. Is
>there a table that provides details of thickness according to the
>foetus' age?

All fetuses have a Nuchal Translucency. I don't have the table available for reference at home unfortunately.

>2. Is the thickness supposed to increase or decrease with the foetus'
>age?

It increeases as the baby grows.

>3. Is there any danger of the umbilical wrapping itself around the baby
>while being so close to his neck?

This is not uncommon too be seen and also not uncommon is a cord around the neck of a perfectly healthy baby being born. When the fetus is small, there aren't too many places for the cord to be.

>We would appreciate any response to our queries - it's gonna be another
>3 weeks before our next appointment and the worry is driving us up the
>wall.

Always feel free to ask questions of your doctor. that's what they're there for.

Hope this helps and write back anytime for more information.

Dr. M >
>Thanks in advance

--
Harvey S. Marchbein, M.D. FACOG, FACS
Great Neck, New York


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