Answer
Designer babies are a form of genetic engineering that involves selecting or altering the genetic makeup of an embryo before it is implanted in the womb. This technology is used to ensure that the baby is born with desired traits, such as a particular gender, eye color, or disease resistance. It is typically done through in vitro fertilization, where the embryo is created outside of the body and then implanted in the mother's uterus. Designer babies are controversial due to ethical and moral concerns, as well as the potential for creating a society of genetically modified humans.