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Aspirin in Pregnancy May Lower Male Sex Drive

Expectant mothers who take aspirin may produce sons with unusually low sex drives, according to a study on rats. Mother rats took a dose of aspirin each day that was equivalent to the dose a human would take for a headache, but as their sons matured, their sex drives didn't. It is not known whether a similar effect occurs in humans, but it certainly reinforces the need to use caution when taking any type of drug during pregnancy. As I wrote last year, aspirin and other painkillers are also known to increase the risk of miscarriage by 80 percent.

Nature May 24, 2004