Add Yahoo as a preferred source to see more of our stories on Google. With little evidence, some people believe a certain probiotic can increase testicle size.Pictured: One large and one smaller ...

A study has suggested that soda consumption may increase testosterone levels and testicle size in men. The study, conducted by researchers at the Northwest Minzu University in China and published in ...

A link between the size of a father's testicles and how active he is in bringing up his children has been suggested by scientists. Researchers at Emory University, US, said those with smaller ...

People with male reproductive anatomy usually have two testicles (testes), commonly called balls. The function of testicles is to produce sperm and testosterone, which is a male sex hormone. These egg ...

The human body is a machine whose many parts—from the microscopic details of our cells to our limbs, eyes, liver and brain—have been assembled in fits and starts over the 4 billion years of our ...

Men who have smaller testes are more likely be better dads to their toddlers, according to a study published in The Proceedings of the National Academy of Sciences. Researchers from Emory University ...

There is a new article making the rounds on the science pages of many online publications. The seemingly shocking claim is that, “Large testicles mean greater infidelity in primates.” In fact, Petter ...