George Julius Engelmann (July 2, 1847 – November 16, 1903) was an American obstetrician and gynecologist who was a native of St. Louis.

In 1867 Engelmann graduated from Washington University in St. Louis, and from 1867 until 1873, he studied medicine in Europe (Berlin, Tübingen, Vienna and Paris).

Engelmann was a founding member of the American Gynecological Society.

The treatise publicised the childbirth positions amongst primitive cultures to the Western world.

They frequently use squatting, standing, kneeling and all fours positions, often in a sequence.