William Hunter on the anatomy of human pregnancy, 1774. This page, showing aspects of the uterus and placenta, is from 'Anatomia uteri humani gravidi' (The anatomy of the human gravid uterus) by Scottish anatomist William Hunter (1718-1783). At lower right is the exertnal uterine blood vessels near to the attachment of the placenta. At lower left is the inside of the placenta. At upper centre is part of the internal surface of the uterus of a woman who died in childbirth. Hunter was the leading obstetrician of the time, and this was his most famous publication. His approach to anatomical illustration was modelled on that used by Leonardo da Vinci.