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 ...

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 ...