 In England, William Smellie developed a method for measuring internal pelvic dimensions.In 1806 Emperor Napoleon appointed Baudelocque as the first chair of obstetrics in France, and at the same time he began serving as physician-in-chief at the Maternité (later named Maternité Baudelocque), where he taught classes on midwifery.Napoleon also chose him as accoucheur to Empress Marie-Louise and to Caroline Bonaparte, the emperor's younger sister.