As humankind moves toward the goal of establishing a long-term presence on the moon and Mars, the question of whether ...

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

Using human stem cells, researchers have created precursors to egg and sperm -- called primordial germ cells -- in a petri dish. Until this work, published in Cell today, the feat has only been ...

Sperm are basically cells with a tail. It can seem surprising that they are able to navigate and swim with purpose. New research has shown that sperm are even able to switch up directions, and alter ...

Space is big, empty, and apparently very confusing if you’re a sperm cell. According to a new study from the University of ...

An egg cell and a sperm need to hold together tightly in the Fallopian tube in order to fuse, resulting in the creation of a new organism. One key part of this process involves the proteins Juno, on ...

When a sperm penetrates it, an egg releases a wave of stored calcium ions. This surge is the universal signal telling an egg to divide and develop. But what exactly is it about the sperm’s arrival ...

It's a Wednesday morning at the National Academies of Sciences, Engineering and Medicine in downtown Washington, D.C., and Dr. Eli Adashi is opening an unprecedented gathering: It's titled "In-Vitro ...

In most living animals, egg cells are vastly larger than sperm cells. In humans, for example, a single egg is 10 million times the volume of a sperm cell. In a new study, Northwestern Engineering ...

Until recently, the only way to make eggs or sperm was the old-fashioned way: in the ovaries and testes. In the not-too-distant future, it may be possible to use cells from almost any part of the body ...