Usta, Ihab M Perinatal outcome of vaginally delivered twin gestations with a larger twin B. [electronic resource] - Journal of perinatology : official journal of the California Perinatal Association - 409-13 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0743-8346 Standard No.: 10.1038/sj.jp.7210935 doi Subjects--Topical Terms: AdultBirth OrderBirth WeightChild Development--physiologyCohort StudiesDelivery, Obstetric--methodsFemaleFollow-Up StudiesGestational AgeHumansInfant, NewbornLabor PresentationObstetric Labor Complications--diagnosisPregnancyPregnancy OutcomePregnancy, MultipleProbabilityRetrospective StudiesTwins