When it comes to male fertility, it turns out that size does matter.
The dimension in question is not penis or testicle size, but a measurement known as anogenital distance, or AGD.
Men whose AGD is shorter than the median length - around 2 inches (52 mm) - have seven times the chance of being sub-fertile as those with a longer AGD, according to a study published on Friday in the journal Environmental Health Perspectives.
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