As the number of U.S. frozen embryos has grown to estimates beyond a million, their moral status has become the crux of discussion among bioethicists.  Vic McCracken, professor of ethics and theology at Abilene Christian University, co-teaches the medical bioethics course with Cynthia Powell, who directs ACU’s Center for Pre-Health Professions. Every year the class includes students who were born through IVF.