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PGD is done by taking one or more cells or
Polar body from the embryo on day 3 and getting a diagnosis
for chromosomes or genes. |
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Chromosome testing is useful in older women
and in women with repeated failure with IVF. A panel of 5-12
chromosomes are tested for their number. |
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An embryo that has a correct number of
chromosomes is called euploid or normal. As opposed to an
incorrect number of one or more chromosomes aneuploid or
abnormal. |
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A euploid or normal embryo would
be transferred and has a high chance of forming a normal
baby. Abnormal embryos would be discarded. |
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PGD is done after assisted hatching one
blastomere is removed and fixed on a slide. |
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The slide then is tested with specific markers
for chromosomes or a specific gene probe. |
