ABC of labour care: unusual presentations and positions and multiple pregnancy.
Chamberlain
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D001946:Breech Presentation; D036861:Delivery, Obstetric; D004420:Dystocia / Q000209:etiology; D005260:Female; D006801:Humans; D007746:Labor Presentation; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011295:Prenatal Care / Q000379:methods*; D011391:Prolapse; D014470:Umbilical Cord