His parents enrolled him in a study that was collecting and storing immature testicular tissue, and the sperm-forming stem cells in them ... administration cuts to science funding, the path ...

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 ...

Two new landmark studies show how a seeming tangle of DNA is actually organized into a structure that coordinates thousands of genes to form a sperm cell. The work, published March 3 as two papers ...