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

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 ...

Assuming that at least during the earliest phases of research, human embryos produced via in vitro fertilization (IVF) would be the best source for producing immortalized stem cell lines ...

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

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 ...

The pollen grain then germinates into a tube that guides the male reproductive cells to the depths of the ovary, picking up signals along the way that reveal the location of an ovule. Blocking signals ...

During the 2024 election campaign, President Trump and other Republicans on Capitol Hill expressed strong support for in vitro fertilization as an important tool in forming families. This past ...

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.