Researchers have performed the first known transplant of sperm-producing stem cells in hopes of restoring fertility in a man ...

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

Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome. These reproductive cells are ...