Not saying this to be argumentative, just facilitate discussion, but how do you define life?
If something were born without a brain, is it alive? It may have been a group of living cells, but could you really call it a human life?
There is similar debate on this with anencephalic children.
Definition of death..."The National Conference of Commissioners on Uniform State Laws in 1980 formulated the Uniform Determination of Death Act. It states that: "An individual who has sustained either (1) irreversible cessation of circulatory and respiratory functions, or (2) irreversible cessation of all functions of the entire brain, including the brain stem is dead. A determination of death must be made in accordance with accepted medical standards." This definition was approved by the American Medical Association in 1980 and by the American Bar Association in 1981."