Sperm cells mature in the epididymis ... only 300 to 500 of them will develop into mature eggs across her reproductive life span. Her body reabsorbs the rest before they complete development.

In an advance for treating male infertility, researchers transplanted a patient with his own sperm-forming stem cells that ...

Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

Meiosis, as described above, is the process by which certain sex cells are created. If you're male, your body uses meiosis to create sperm cells; if you're female, it uses meiosis to create egg cells.

“Sperm are so radically different from any other cell type. They transfer between bodies ... in light of its peculiar life cycle of maturation, long waiting period, and arduous journey to ...

Just because a sperm is a strong swimmer doesn't necessarily mean it has the right amount of DNA, Dr. Lisa Lee told Newsweek.