Research from University College London has shown that male flies that are genetically programmed to produce only female offspring compensate for their low sperm count by growing larger testes. Male ...

The phrase “summer long balls” might sound like locker-room slang, but it’s increasingly being mentioned on social media and online forums as a seasonal curiosity. In hot weather, men’s scrotums which ...

The testis is responsible for sperm production and testosterone synthesis. Abnormalities in testis development and function lead to disorders of sex development (DSD) and male infertility. Currently, ...

Injuries, infections, kidney stones, hernias, and testicular cancer can all cause testicular pain. Sometimes, pain in your balls may not have an obvious cause and will go away without treatment. Get ...

Dunn’s team analyzed the biological “budget” of these primates and found a direct negative correlation: males with large ...

Toxic masculinity is a major societal concern. It is said that testosterone from the testes makes men overly aggressive. But the biology of hormones and aggression is not that simple. A symposium ...

The first-ever 3D model of testicles, made using mouse cells, could improve our understanding of sex development disorders and male infertility. When you purchase through links on our site, we may ...

Researchers at the Smithsonian Conservation Biology Institute (SCBI) have generated mature sperm from frozen testicular tissue for the first time. Their findings were published in PLOS ONE today. The ...