Taking mild painkilllers such as aspirin, acetaminophen and ibuprofen during pregnancy, especially during the second trimester, can cause a sharp increase in reproductive problems in male offspring, researchers from Denmark, Finland and France reported Monday. The team found that women who used two of the drugs simultaneously during the second trimester were as much as 16 times as likely to bear a son with undescended testicles, a condition known as cryptorchidism. Cryptorchidism is known to be a risk factor for poor semen quality and testicular germ cell cancer in later life. The researchers demonstrated in rats that the drugs block the production of testosterone, which is necessary for the formation of male sex organs.
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