The majority of fertilized eggs die and are resorbed into the body. ZEISS Microscopy/Flickr, CC BY-SA As an evolutionary biologist whose career has focused on how embryos develop in a wide variety of ...

In a common metaphor used to describe human fertilization, sperm cells are competitors racing to penetrate a passive egg. But as critics have noted, the description is also a “fairy tale” rooted in ...

Many state legislatures are seriously considering human embryos at the earliest stages of development for legal personhood. Total abortion bans that consider humans to have full rights from the moment ...

Concerned by the speed of research, policymakers are looking for alternative ways to establish rules on genome editing and other technologies. Outside the Third International Summit on Human Genome ...

Beej Sanskar is an ancient Indian concept that places fertility far earlier than ovulation charts or pregnancy tests. It centres on the quality of the seed - sperm and egg - and the physical, ...