Similar to monthly hormonal cycles that many cisgender women experience, cis men also experience hormone cycling with testosterone, a masculinizing sex hormone. Rather than monthly cycles, though, ...

A month-long study of a man's brain revealed that its volume consistently shrunk over the course of each day and then reset overnight. When you purchase through links on our site, we may earn an ...

Male sexual heat is a common feature of wild animals like deer, elephants, and many bird species. It is related to annual increases in testosterone production that increases aggression and sex drive.

From testosterone to FSH and LH, a number of hormones drive male fertility. These chemical messengers regulate sperm production, sex drive, and more. Imbalances have the potential to contribute ...