The following references illustrate the fact that a new human embryo, the starting point for a human life, comes into existence with the formation of the one-celled zygote: "Development of the embryo ...

Another hurdle has emerged that must be overcome for long-term space habitation and the colonization of Mars. On the 26th (local time), a team led by Professor Nicole McPherson from the University of ...

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

"This is the first time we have been able to show that gravity is an important factor in sperm’s ability to navigate through ...

Sperm may lose their ability to navigate in microgravity, raising new questions about whether human reproduction is possible ...

Making babies in space may be more complicated than expected, as new research shows sperm struggle to navigate in microgravity. Scientists found that while sperm can still swim normally, they lose ...