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 ...

A pregnancy test detects the presence of the pregnancy hormone human chorionic gonadotropin, or hCG, in a person’s body. But the body doesn’t produce that hormone until several days after conception.

Conception close to mid-cycle is generally accepted as typical for monkeys and apes as well as humans. But copulation outside the fertile window is widely touted as uniquely human, despite decades of ...

An Alabama Supreme Court decision that gives fertilized eggs the same legal status as children is already influencing people seeking fertility treatment – and could have even broader impacts on ...

In two weeks, South Carolina lawmakers will be in Columbia to discuss a bill that looks to change the state's abortion laws. S. 323, titled the 'Unborn Child Protection Act,' says pregnancy starts at ...