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New technology poses medical, ethical dilemmas
Doctors have formed embryos outside the body for almost 30 years, since the first in vitro fertilization was performed to aid infertile couples.
But when parents use preimplantation genetic diagnosis (PGD) to try to select a donor sibling, they no longer are choosing the embryo most likely to make a healthy baby. They are instead choosing the embryo they need to meet their goal of curing...
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