(medicine) The fertilization of anovum bysperm outside of a woman's body; normally used as a treatment forinfertility.
2017 March 21, Carl Zimmer, “A New Form of Stem-Cell Engineering Raises Ethical Questions”, inThe New York Times[1], archived fromthe original on23 March 2017:
In recent years, scientists have moved beyondin vitro fertilization. They are starting to assemble stem cells that can organize themselves into embryolike structures.
