Boys and Girls Balance Out at Conception, Study Says

March 31, 2015 1:35 AM

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Boys and Girls Balance Out at Conception, Study Says

Every year, slightly more boy babies than girl babies are born worldwide. But back when sperm meets egg, the two sexes are conceived in equal numbers, a newly published study suggests.

That contradicts the idea found in many textbooks and scientific articles that males are in the majority at conception, researchers said. And it implies that more females than males die before birth, resulting in the excess of male births, says Steven Orzack, a study author. "We don't have good info...

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