Who hasn't seen it before: the view through the microscope in which a sperm penetrates an egg cell and fertilizes it. This fundamental step in procreation happens dynamically and seemingly without ...

Human bodies have to be built from a single egg cell that's fertilized by a sperm cell. Many rounds of cell division occur as the body is developing, and it seems that there are plenty of chances for ...

Conception can happen within minutes or up to five days after sex, depending on when you ovulate. Identifying your fertile window and when you ovulate can improve your chances of conceiving if you are ...

An international team of researchers has discovered a fundamental protein in human fertilization, called MAIA, which could lead to an improved understanding of infertility. For fertilization to be ...

Age-related declines in fertility are most pronounced in women over age 35. We explore why infertility can be challenging for older couples trying to conceive.

With the help of the ESRF, researchers from Karolinska Institutet (Sweden) have discovered the reproductive mechanism that permanently blocks polyspermy — a pathologic condition that arises when more ...

Artistic depiction of how fusion of a sperm with an egg at fertilization triggers a cascade of events that ultimately zips up the filamentous matrix around the egg, thus permanently blocking ...

Scientists at Michigan State University have uncovered the molecular “switch” that powers sperm for their final, high-speed dash toward an egg. By tracking how sperm use glucose as fuel, the team ...

Egg fertilization is often described as an epic swim meet: Millions of sperm swim as fast as they can toward the egg until ...