Paterna Biosciences says it has determined the set of instructions needed to turn sperm-making stem cells into "normal, ...

Utah startup says it grew human sperm in lab, creating embryos in early test of infertility breakthrough.

Out of about 100 million sperm, only a few hundred make it to the fallopian tubes. A directional movement called rheotaxis, guides sperm cells to swim against the cervical mucus flow to reach the egg ...

The first babies ever made with a sperm-injecting robot reportedly were born thanks to a cutting-edge procedure that experts say could lower the cost of IVF by thousands of dollars. Engineers used a ...

Why is Male Sperm Quality Important? In the human reproductive process, both men and women play equally significant roles.

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 ...

The success of in vitro fertilization depends on many factors, one of which is sperm viability. A recent study from the University of Illinois Urbana-Champaign documents a new way to select viable ...

Sperm size varies dramatically among different animal species. But why is sperm size so variable when they share the same job - to fertilize eggs? In a new article published in Nature Ecology and ...