Push notifications provide a way for web services to push data to users' devices without waiting for a game to initiate the web request. Push notifications can be sent from any source that can make a web request: a server, a desktop PC, even another Windows Phone.
Medical Definition of Teratogen. Teratogen: Any agent that can disturb the development of an embryo or fetus. Teratogens may cause a birth defect in the child. Or a teratogen may halt the pregnancy outright. The classes of teratogens include radiation, maternal infections, chemicals, and drugs.
However, your feedback is important to us. Teratogens are drugs, chemicals, or even infections that can cause abnormal fetal development. There are billions of potential teratogens, but only a few agents are proven to have teratogenic effects. These effects can result in a baby being born with a birth defect. Approximately 4 to 5 percent of birth defects are caused by exposure to a teratogen.