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Re: 20 weeks scan checks

From: Becky (anonymous@obgyn.net)
Wed, 14 May 2003 15:09:40 -0500 (CDT)

On a Level 2 ultrasound - where a specialist performs it, the signs (markers) of downs are caught more like 60%-70% of the time. Additionally, there are some markers that are much more definitive of ds. (nuchal fold and nasal bone) A second L2 u/s done 3 weeks later will catch additional markers. So, it's not foolproof, but only you and your perinatalogist can decide that. Amnio is a sure fire way to know, but given the miscarriage rate, may be more risky than the risk of your baby even having downs syndrome. On an u/s in a dr's. office, I have no idea of the accuracy. I've read studies, none site very high results. The dr's are not specialists in that field, although, I'm sure some are better than others.

At Wed, 14 May 2003, anonymous@obgyn.net wrote: >
>My doctor said only about 30% of Down Syndrome fetus's will show any
>signs of Down Sydrome on the standard 20 week ultra sound. (Meaning 70%
>of the time, there is no sign of Down Syndrome visible even when Down
>Sydrome is present).
>
>At Wed, 14 May 2003, B wrote:
>>
>>I think it could discover POTENTIAL signs of Down Syndrom that would
>>need to be checked into further w/ other modes of testing but I don't
>>think it can actually diagnose it.
>>
>>At Wed, 14 May 2003, Marc wrote:
>>>
>>>would a 20 week routine scan show up downs syndrome if it were present?

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