Sperm cells are known to prefer cooler temperatures. For quite some time, a puzzling question for scientists has been: how do temperature-sensitive swimmers actually operate effectively within the ...

An innovative treatment could one day help restore fertility in men who do not have the capability to produce sperm, such as cancer survivors or those with certain genetic disorders. Scientists have ...

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New research shows how sperm RNA changes as men age, revealing a biological shift that may affect reproduction and child ...

A man in his early 20s received a transplant of his own sperm-producing stem cells, which had been frozen since his childhood, in an attempt to regain fertility. Doctors are waiting to see if the ...