Nakajima, Yoshiyuki Obstetrical risk factors for focal intestinal perforation in very low birth weight infants. [electronic resource] - Journal of perinatal medicine 03 2011 - 179-84 p. digital Publication Type: Journal Article ISSN: 1619-3997 Standard No.: 10.1515/jpm.2010.129 doi Subjects--Topical Terms: AdultApgar ScoreCase-Control StudiesFemaleFetal Hypoxia--complicationsGravidityHumansInfant, NewbornInfant, Very Low Birth WeightIntestinal Perforation--etiologyIschemia--complicationsMaleOligohydramnios--physiopathologyPregnancyPregnancy Complications--physiopathologyRetrospective StudiesRisk FactorsUmbilical Cord--pathologyUmbilicus--blood supply