Prolactin is a protein that in humans is best known for its role in enabling mammals, usually females, to produce milk; Prolactin is secreted from the pituitary gland in response to eating, mating, estrogen treatment, ovulation, and nursing. This tissue is perhaps more extensive in some women than in others, which may contribute to orgasms experienced vaginally. Like testosterone , people often say it's responsible for things it doesn't usually have much to do with like mood. Perchlorate This rocket fuel component can severely disrupt the proper thyroid function. Low Cost Incubator A unique womb-like environment designed by pediatric researchers could transform care for extremely premature babies, by mimicking the prenatal fluid-filled environment to give the tiniest newborns a precious few weeks to develop their lungs and other organs. If you have a long cycle, the dry days after your period may also be safe. Someone who has had or is currently having some kind of genital sex with a partner or partners.