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

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 ...

They use CRISPR-based engineering methods to prompt stem cells to organize into "programmable" embryo-like structures, also known as embryoids, which can be used to study the role of certain genes in ...

A key part of the fertility process involves IZUMO1, a protein on the surface of sperm cells, and JUNO ... the way sperm come into contact with an egg. The analysis also identified a high-affinity ...

The fluids provide the sperm cells with nutrients ... The cilia waft the egg along inside the oviduct and into the uterus. The uterus, also called the womb, is a muscular bag with a soft lining.

A key part of the fertility process involves IZUMO1, a protein on the surface of sperm cells, and JUNO ... the way sperm come into contact with an egg. The analysis also identified a high-affinity ...

One childless man’s journey through the sci-fi start-ups, DIY donor clubs, and group masturbation retreats attempting to save ...

"Abnormal sperm formation impairs their ability to fertilize egg cells," explains Yuki Kaneda ... the findings from this study provide important insight into the causes of male infertility.

In healthy people, levocarnitine is responsible for carrying fats into cells and also is ... another important component of sperm that allows them to fertilize the egg. ProXeed also contains ...

A fetus is made from a sperm cell and an egg cell. Germ cell tumors (GCTs) are also known as germ cell cancer. Germ cells later turn into either sperm in the testicles or eggs in the ovaries. Sex cord ...