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 found that microgravity simulated on Earth hindered sperm cell movement, egg fertilization and embryo development.

How a sperm and an egg fuse together has long been a mystery. New research by scientists in Austria provides tantalizing clues, showing fertilization works like a lock and key across the animal ...

An international team of researchers has discovered a fundamental protein in human fertilization, called MAIA, which could lead to an improved understanding of infertility. For fertilization to be ...

It's a commonly held belief: Sperm cells are like runners in an epic race, competing against each other for access to the coveted egg at the finish line. The egg, in turn, waits patiently for the ...

Who hasn't seen it before: the view through the microscope in which a sperm penetrates an egg cell and fertilizes it. This fundamental step in procreation happens dynamically and seemingly without ...

During mammalian reproduction, millions of sperm undertake a journey that only one will finish. This journey to fertilization has been commonly viewed as a race: a sea of sperm competing to get to the ...

June 21 (UPI) --For every animal, sperm perform the same function -- egg fertilization. Yet sperm size varies dramatically from species to species. Most studies on the topic have focused on how sperm ...

More than three months after suffering from mild COVID infection, men have lower sperm concentrations and fewer sperm that are able to swim, according to new findings presented at the 39th annual ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. How a sperm and an egg fuse together has ...