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Old 06-28-2005, 03:29 PM   #1
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anyone know

Hi I think this is the most appropriate board as some of you may have had cvs testing for down syndrome could any of you kindly share any information you may have on the accuracy of cvs testing and how high a risk of 1 in 23 sounds. This would be much appreciated cheers very much in advance

 
Old 06-29-2005, 01:35 AM   #2
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Re: anyone know

test is called chorionic villus sampling, {removed} It's very accurate for detecting Downs syn, about 99%. It's advantage over amnio is that it can be done earlier, 10-12 wks, vs 15-22wks depanding on the center. 1 in 23 risk means little unless you tell us your age. As you know risk for Downs increases w/ age, so for me at 28 yrs of age, normal risk is 1:1000, but I tested 1 in 270, and had amnio. So my 1 in 270 may not mean like much of a risk compared to 1 in 23 but for my age it was. They usually offer amnio to all women over 35 b/c risk increases dramatically after that age,
MATERNAL AGE RISK AT BIRTH RISK AT 12 WEEKS
20 1/1527 1/898
25 1/1352 1/795
30 1/895 1/526
32 1/659 1/388
34 1/446 1/262
36 1/280 1/165
38 1/167 1/98
40 1/97 1/57
42 1/55 1/32
44 1/30 1/18

so as you see, it's all relative, the triple screen is only a screen, if it comes up negative, there is no guarentee that your baby would not have Downs, but it would be very unlikely. Hope this helps a bit.

Last edited by Moderator BAC; 06-29-2005 at 05:51 AM. Reason: Do not instruct others on off board searches. Thank you!

 
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Old 06-29-2005, 04:17 AM   #3
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Re: anyone know

hi thanks for posting it is my sil who is 36 years old who is having the test, i am ttc again thanks for your help

 
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