Despite significant biomedical advances in recent decades, the very earliest events of human development¬--those that occur during a critical window just after fertilization--have remained an ...

When couples experience infertility, medical science presents possible solutions for a potentially successful conception of a baby. Infertility issues can be addressed with Human Chorionic ...

Human bodies have to be built from a single egg cell that's fertilized by a sperm cell. Many rounds of cell division occur as the body is developing, and it seems that there are plenty of chances for ...

Analyzing embryo movements in uteruslike environments could offer clues to improving the success rate of in vitro fertilization ...

Some men produce too many sperms. That little-mentioned fact was the focus of my previous blog post. (See Why Too Many Sperms Spoil the Egg, posted on August 11, 2017.) With too many sperms, an ...

Almost anyone with a high school education can correctly answer the question “When does human life begin?” by responding “at conception” or at “fertilization” of a human egg by a sperm cell. While we ...

A young Black couple sits on a couch smiling, as the man lays his hand on the pregnant belly of his partner If you’re thinking about pregnancy, you’ve probably come across the term implantation in ...

For the first time, researchers have witnessed the exact moment conception occurs— and have recorded the ensuing explosion of sparks that form when sperm meets an egg.