Campbell, D M Maternal complications of twin pregnancy. [electronic resource] - International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics Jan 2004 - 71-3 p. digital Publication Type: Journal Article ISSN: 0020-7292 Standard No.: 10.1016/s0020-7292(03)00314-x doi Subjects--Topical Terms: Abruptio Placentae--epidemiologyFemaleHumansPregnancyPregnancy Complications--epidemiologyPregnancy OutcomePregnancy, MultipleRetrospective StudiesRisk FactorsTwins