Add Yahoo as a preferred source to see more of our stories on Google. As an evolutionary biologist whose career has focused on how embryos develop in a wide variety of species over the course of ...

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 ...

By Dr. Sanchari Sinha Dutta, Ph.D. A landmark randomized trial shows that preparing the uterus using natural ovulation ...

The process of human ovulation has long been shrouded in mystery. We know that once or twice a month, women release tiny eggs from their ovaries into their fallopian tubes, which usher eggs into the ...

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 ...

New Haven, Conn. — 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 ...

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 ...

If you love kids and have been trying to get pregnant for a while, it’s important to know when you ovulate. This matters because you can significantly increase your chances of getting pregnant by ...