Somewhere near where you live, a couple will discover this week that they are infertile and that if they want biological children of their own, they are going to need in vitro fertilization (or IVF).

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Even more radical was the invention, in 1978, of in-vitro fertilization, or IVF, the now-common technique in which egg and sperm meet in a laboratory petri dish and create an embryo that is then implanted in the would-be mother's womb.

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