We have identified a region in the gene encoding RSX where DNA methylation is different in sperm and egg cells, suggesting a possible mechanism for the control of XCI in marsupials. Our findings ...

All new babies start as an egg and a sperm, but where do those two cells come from in the first place? Your reproductive organs produce the sex cells that make a baby. Sperm cells begin their life ...

It helps make semen, the milky fluid that carries sperm through the penis and outside the body when you ejaculate. Prostate cancer happens when cancer cells form in prostate tissue. Your chances ...

Puberty is also where males start to produce sperm. Hormones produced in the brain stimulate the production of a different hormone called testosterone, which tells cells in the testicles to ...

Sean “Diddy” Combs’ ex-girlfriend, Cassie Ventura, began what could be a days-long testimony in Combs’ sex trafficking trial Tuesday, alleging on the witness stand Combs had subjected her ...

For sex sorted semen, the ability to shift the gender ratio of a calf crop comes from the fact that gender is determined by the sperm cell that fertilizes the egg. Sperm cells that result in a heifer ...