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

Eggs get fertilized ... Here are three of many, many examples: ‐“Human life begins at fertilization, the process during which a male gamete or sperm unites with a female gamete or oocyte ...

This includes a medical process hopeful parents go through to ... reproductive health procedures that involve embryos and fertilized eggs. Since 2022, when Roe v. Wade was overturned, whether ...

it also regulates fertilization so that only a single sperm may enter the egg. Here, the glass needle is in the process of removing the nucleus from within the egg. If you look closely at the tip ...

The line of stem cells that was developed from that monkey egg has proven to be as valuable and as robust as stem cells from leftover fertilized human eggs [from fertility clinics]. NOVA ...

This is a fertilized human egg, prior to division. Two nuclei (one from the egg and one from the sperm) can be seen in the center. Disclaimer: AAAS and EurekAlert! are not responsible for the ...

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

A company called Gameto claims to have successfully matured eggs outside of the female body, a development that could ...

The success of in vitro fertilization depends on many factors, one of which is sperm viability. A recent study from the ...