Shari Motro

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For most of human history, a woman who became pregnant after sleeping with more than one partner had no way of definitively knowing the identity of the man with whom she had conceived. Likewise, a man whose lover became pregnant had no way of knowing for sure whether his or another man’s DNA was gestating inside her.

Since the 1970s it has been possible to genetically link a father and his baby with increasing levels of accuracy. Then, a test using amniotic fluid let us test a baby’s DNA before birth, but the procedure increased the risk of miscarriage. Now a prenatal blood test has made the process far easier.…  Seguir leyendo »