Within minutes of fertilization, the egg of a fruit fly becomes a scene from the battle of the sexes. The egg attacks and destroys the cellular "power plants" (mitochondria) from the sperm that had ...

Did you know that millions of sperm race toward the egg during ovulation, yet only one completes the journey? Many patients and couples trying to conceive worry about what truly happens at this moment ...

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. The ...

About 9% of men of reproductive age in the United States experience fertility problems. One of the many causes of male ...

Ovulation marks a significant turning point in your menstrual cycle, often associated with fertility and new beginnings. Yet many people wonder what truly happens after the egg is released. But how ...

Add Yahoo as a preferred source to see more of our stories on Google. Prof Josef Hanna demonstrates the process he and his team of scientists used to develop models of early-stage human embryos ...

Clear legal rules outlining the use of the sperm and eggs of those who are incapacitated must remain in place to protect the vulnerable from being involved in fertility treatment without their consent ...

This is an updated version of a story first published on May 4, 2025. The original video can be viewed here. Fertility rates in the United States are near historic lows. One reason is a sharp decline ...

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, ...