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 ...

When sperm meets egg, the start of life is not quiet. Under a special microscope, researchers have watched a tiny light show at fertilization. They see a microscopic flash at fertilization, a burst of ...

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 ...

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 ...

Scientists based at The Rockefeller University have created an experimental system that models the implantation of a human embryo. The new system, an adaptation of one used to recapitulate the ...

Multiple genetic changes can occur before or early after conception, a new study describes. The researchers looked at a type of genetic change called copy number variants, which refers to the number ...

A stunning explosion of zinc fireworks occurs when a human egg is activated by a sperm enzyme, and the size of these 'sparks' is a direct measure of the quality of the egg and its ability to develop ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. As an evolutionary biologist whose career ...