That's why the testes hang down, away from the body, for most mammals. So when you wear tight underwear, the resulting increase in temperature can damage the sperm, and potentially your fertility ...

The causes of hypogonadism may be primary (related to the testes in males or ovaries in females) or secondary (related to the pituitary gland and hypothalamus in the brain). The treatment typically ...

The temperature of the testes is at issue: In order for testes to produce sufficient quality and quantity of sperm, the temperature of testes must be lower than the core body temperature.

Medical experts strongly recommend that UDT be treated early, ideally before the child turns one. The primary treatment, known as orchidopexy, surgically repositions the testis in the scrotum.

Two hormones are critical in normal sex differentiation. The testes of normal 46,XY males secrete both Müllerian Inhibiting Substance (also known as MIS or antimüllerian hormone) and ...