One RC theologian in the U.S. continues to do his best to establish that human life does not begin at conception.  Peter Steinfels of the New York Times, in a news story which appeared in the Globe and Mail (January 14), outlined arguments by Rev. Richard McCormick that new life does not exhibit the stable and determinate character necessary for considering it a distinct individual; and Thomas Shannon and Rev. Allan Wolter in another article try to argue a similar conclusion.
Vatican documents based on science stress that conception initiates a distinct and genetically unique existence: “from fertilization the biological identity of a new human individual is already constituted,” they state.  The authors of the recent articles contend, however, that the pre-embryo is not that kind of distinct individual; it may even divide into twins, for example.