LONDON — Despite warnings that a new ethical threshold was being crossed, British lawmakers on Tuesday voted to allow the in vitro creation of babies using the DNA of three people, a procedure that could prevent the inheritance of genetic diseases.
The move would make Britain the first country to authorize an in vitro fertilization technique that involves altering a human egg or embryo before transferring it to the womb.
The issue provoked fierce debate, with some opponents likening the procedure to genetic modification and arguing that it would open the way to the creation of so-called designer babies.
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