In a mouse or human embryo, the cells that will one day produce sperm or eggs are already earmarked for that future purpose, Namekawa said. These primordial germ cells are initially "bipotent"—able to ...

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how a humble single cell becomes an organism fascinates scientists across ...

Having more than 120 million gametes is associated with up to three more years of life. Once again, a Danish study points to ...

As viewed from a human perspective ... If you're male, your body uses meiosis to create sperm cells; if you're female, it uses meiosis to create egg cells. Others cells in your body contain ...

In a study of early embryonic development in primates, an international research team under the leadership of Berthold ...

In a mouse or human embryo, the cells that will one day produce sperm or eggs are already earmarked for that future purpose, Namekawa said. These primordial germ cells are initially “bipotent” — able ...

Beating pattern of a human sperm cell before (left) und after (right) activation of CatSper. The more powerful beat is required to fertilize the egg Disclaimer: AAAS and EurekAlert! are not ...

In a potential breakthrough for infertility and genetic disease treatments, scientists at Kyoto University have succeeded in mass-generating precursors to sperm and eggs from human iPS cells. Two ...

the researchers analyzed experimental data on human sperm and also modeled the motion of green algae, Chlamydomonas, as both swim using thin, bendy flagella that protrude from the cell body and ...