entific community that specializes in embryology.
https://prolifepages.wordpress.com/2012/09/19/when-does-human-life-begin/
Dianne N. Irving, M.A., Ph.D. has one of the more concise and precise summations of the question of when human beings first come into existence in her lifeissues.net article:
Cloning:
When Word Games Kill
http://www.lifeissues.net/writers/irv/irv_06wordgame.html
“It might surprise many that there has been an unaltered scientific consensus for half a century that a real, already existing, live, whole human being begins as a human embryo (or zygote) immediately at fertilization. This is a scientific fact – not an “opinion”, or a religious or theological belief. And public policy debates and decision making should not continue to escape that unavoidable scientific fact.”