We don’t get to choose which of our genes we pass on. Every conception
is a roll of the dice. But that could be about to change with emerging
technology called “preimplantation genetic testing for polygenic
disorders.”
A technology that allows parents who can afford the
cost of the procedure to select which embryos should be allowed to
survive based on their desired traits. In humans, selective breeding is
called eugenics.
Could this new eugenics movement eventually
result in a new breed of elitist humans that are sufficiently
genetically distinct from the rest that the two populations are no
longer genetically similar enough to interbreed?
Testing of a
foetus or embryo is already common. Prenatal Down’s Syndrome tests, for
instance, are so widespread that in some Scandinavian countries, almost
100 per cent of women choose to abort a foetus diagnosed with the
condition, or – if using IVF – not implant the affected embryo. The
result is a visible change to these populations: there are simply no
more people with Down’s to be seen on the streets of Iceland and
Denmark.
Until now, these prenatal tests have been available only for some conditions.
Preimplantation genetic testing for polygenic disorders (“PGT-P”),
hereafter “polygenic screening,” is a genetic test designed to screen
for multiple genes associated with a polygenic disorder,
which is a condition caused by the interaction of multiple genetic and
environmental factors. This test is typically performed on embryos
created through in vitro fertilisation (“IVF”) and aims to identify
embryos with a lower risk of developing a polygenic disorder....<<<Read More>>....