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March 8th, 2013, 08:33 PM
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8miraclez 8miraclez is offline
Formerly Halfbaked
Join Date: Jul 2007
Posts: 7,472
I'll probably be no help but I actually opted out of the nt and afp because exact conception date was questioned and they said it would give a false positive. I've heard a vanishing twin will also give a false positive. I was just going to get the maternit21 test done instead but never got the chance. At 15wks they found birth defects and at 17wks I ended up getting an amnio done. In my case, the afp would have given a false positive for downs because my baby has a spina bifida, but the maternit21 test wouldn't have. The amnio came back completely normal as well.
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