New study finds no strong evidence that the chemicals contribute to a common birth defect of the penis, though some research has linked chemicals in chlorinated tap water to the risk of birth defects. The defect, known as hypospadias, occurs when the urinary outlet develops on the underside of the penis rather than at the tip. Genetics are thought to play a large role in hypospadias risk, but the other potential causes are not fully understood.

Tap Water
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