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

A genetic mutation in mice affects cells required for sexual reproduction and holds clues about male infertility that could pave the way for new treatments and male contraceptives, a Rutgers ...

SPO11-mediated DNA cleavage therefore represents a high-stakes gamble for a cell: double-strand breaks ... location and timing of DNA cleavage in meiosis has further benefits beyond limiting ...

In the United States, more than 11% of men under the age of 49 are infertile. While the causes are varied and range from ...

They are formed in a woman's body before birth and have to be on standby for decades to possibly be fertilized one day. But ...

Those germ cells that enter meiosis become oocytes ... oocytes within the ovary are already much larger than sperm, and the future egg retains most of this volume as it passes through meiosis.

While the causes are varied and range from infections to hormonal imbalances, deformities during meiosis – a specialized cell division process that creates sperm and eggs – is a leading cause.

A new way to measure male fertility has been discovered by researchers at the University of Waterloo, opening the door to the ...

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.