"These cells co-develop together, just like they would in an actual embryo, and establish that history of being neighbors," ...

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 ...

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

For 50 years, scientists in Großbeeren have studied how different fertilization strategies affect vegetable and soil quality.

Griffith said that on day three after fertilization, an embryo is anywhere from six to 10 cells. By day six, it’s between 100 and 300 cells. In comparison, he said, a person contains more than 1 ...

In vitro fertilization (IVF). This fertility procedure helps couples and individuals conceive by combining a woman’s eggs with a man’s sperm in the lab. Research on HeLa cells paved the way ...

Her mood changed when the results came back. The test deemed each of the Petersens’ five embryos abnormal, meaning their ...

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.

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, ...