Scientists have found a way to study early embryonic development without real embryos. Using CRISPR, they programmed stem cells to self-organize into structures mimicking early embryos. The cells show ...

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how a humble single cell becomes an organism fascinates scientists across ...

It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery.The process of how a humble single cell ...

A Yale-led research team has uncovered how a naturally occurring biological mechanism found in mammals is able to prevent sperm cells from interacting with an egg, preventing fertilization.

Human biology is not black and white. Although newborns are typically categorized as male or female at birth based on visible ...

A research team has uncovered how a naturally occurring biological mechanism found in mammals is able to prevent sperm cells from interacting with an egg, preventing fertilization. The discovery, ...

In a study of early embryonic development in primates, an international research team under the leadership of Berthold ...