This document discusses the ethical issues surrounding genetic engineering and using medical procedures to create life for the purpose of saving another. It notes that while such techniques can help dominate processes of reproduction, they also risk going beyond reasonable dominion over nature. The Vatican and bishops believe life is a gift from God that we have stewardship over but not absolute control. The discussion considers who gets to choose what is done with their body and argues we are stewards who make decisions with God in mind, not just for our own ends.