Only if they have day 5 testing capability. They would have to take cells from the trophoblast, the outer layer of the embryo, and assuming they could do that, yes, they could do a rapid FISH test for gender.
It depends what the abnormality was whether or not it is likely to be normal. Any monosomy could retest 100% normal- that is the most common situation.
Results 11 to 14 of 14
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January 25th, 2013, 06:46 PM #11
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January 26th, 2013, 04:08 PM #12Dream Vet
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Thanks for your answer
So, did I get it right: if the abnormality is f.e. a trisomy (3x21 or XXX) - then this is a real abnormality? A retest isn't necessary?
But a monosomy (f.e. 1x21 or X) could be a "false negative" A retest could show this?
Thanks!
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January 26th, 2013, 04:39 PM #13
There is a quoted 10% error rate per probe with FISH.
The monosomy example has just proved itself to be true with FISH and more likely than a trisomy to be normal. I can't answer beyond that because I just don't know.
Unless your clinic performs day 5 biopsies, there will be no retesting. It's not the same as day 3.
Dr Potter retests Natera day 3 abnormals IF it is a single issue on day 3. He does not rebiopsy complex abnormals.
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January 26th, 2013, 07:12 PM #14Dream Vet
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Thanks that helps a lot!!!
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