Obstetric anesthesia and conceptos of placental transport: a historical review of the nineteenth century.
D000773:Anesthesia, Obstetrical / Q000266:history*; D004739:England; D005260:Female; D005602:France; D005858:Germany; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D014481:United States