WASHINGTON – The revelation in late November that a Chinese researcher had edited genes in human embryos and then implanted them in a woman was "a train wreck of a thing to do," said an ethicist at the National Catholic Bioethics Center in Philadelphia.

A private member’s bill that would decriminalize the purchase of sperm, eggs and rent-a-womb surrogacy would open the door to exploitation of poor women and legalize a form of child trafficking, according to a member of the 1990s Royal Commission on New Reproductive Technologies.