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How often do PGT-A / PGS tested embryos fail?

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1 fertility expert(s) answered this question

What percentage of embryos come back normal after PGS testing?

There is much unclear information regarding genetic testing and its impact on embryos and also success rate. What statistics show might be surprising for most.

Answer from:
Geneticist, Head of the PGT lab Embryogenesis IVF Unit Athens
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As I have already mentioned, every lab is different and has different pregnancy rates, clinical pregnancy rates and live birth rates therefore I can only speak on behalf of our lab. In our hands PGTA tests fail around 40%. We have 60%of clinical pregnancy rates that achieve live births, so 40% of the cases where we do a single embryo transfer, the embryo fails, it does not implant and does not lead to a pregnancy.