Conditions of delivery in multiple pregnancy. Observations on the Danzig population over twenty years.
D000328:Adult; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007746:Labor Presentation; D008423:Maternal Age; D010298:Parity; D011044:Poland; D011247:Pregnancy; D011272:Pregnancy, Multiple; D013997:Time Factors