So that small cluster of cells that have no defined form are human life. OK, if life begins at conception is it safe to say that life ends when all cell activity ceases? When the cells stop reproducing! Its the same standard isn't it?
Does life end when the heart stops beating? Does it begin when the heart starts beating? Does it begin and end when a person starts and stops breathing? Does it begin and end when the cells stop reproducing? If life starts at conception isn't it safe to say that it doesn't end until all the cells die!
What about a transplanted heart, who's heart is it? Twenty years after the transplant is the DNA in the cells of that heart the donor's or the recipient's?