Citation

Nature 2001; 412(6844): 255.

Copyright

(Copyright © 2001, Holtzbrinck Springer Nature Publishing Group)

DOI

10.1038/35085689

PMID

unavailable

Abstract

'Pro-life' groups define the beginning of human life as the union of sperm and egg, and equate the harvesting of human embryonic stem cells to homicide. But our biological understanding lends little support to these views.