For a sperm produced in the testis of a man to fertilize a woman’s egg, the sperm must first mature in a man’s epididymis, a duct that helps to transport and store sperm. However, the exact mechanisms ...

A new study identifies the defective function of CatSper, an ion channel controlling calcium levels in sperm, as a common cause of seemingly unexplained male infertility. CatSper-deficient human sperm ...

The successful union of egg and sperm in fertilization depends on a sperm cell’s ability to get through an egg’s thick protective coating and latch itself to its membrane. A study published in the ...

In a zero-gravity environment, sperm's ability to orient and navigate towards an egg was significantly reduced. Provided by Getty Images Bank Another hurdle has emerged that must be overcome for ...