The controversial source of stem cells is human embryos. Everybody in this Chamber was a human embryo at one time. Extracting stem cells from a human embryo kills him or her. The embryo is no larger than a full stop but is a complete human being fully programmed to grow and mature. For the embryo to develop nothing further is added only time and nourishment and the embryo's genetic programme determines what kind of baby and adult will eventually emerge. Nourishment is part of that process. A three-day old embryo requires nourishment and care, as does a three-day old, three-week old, three-month old baby or a three-year old child.