Lab grown models of embryos, made from clusters of stem cells, are getting increasingly complex. Ethicists, regulators and ...

A newly created cell model of the amniotic sac could reveal new insights into early pregnancy, as well as generate helpful products for medical use.

A doctor claims to have cloned human embryos and implanted them in women. April 23, 2009— -- A controversial fertility doctor claims to have cloned human embryos and implanted them into four ...