Obstetric Factor Analysis of 486 Very Low Birth Weight Infants and Extremely Low Birth Weight Infants

Objective To investigate the obstetric factors related to very low birth weight infants and extremely low birth weight infants,andto reduce the natality of them.Methods Retrospective analysis was done on the clinical data of 486 very low birth weight infants and ex-tremely low birth weight infants and 427 pregnant women,who gave birth to babies between January 2008 and October 2010 in our hospital.Results Among 486 very low birth weight infants and extremely low birth weight infants,89.51% were preterm infants,with gestational agemainly between 28 and 32 weeks.The incidence of very low birth weight infants(84.16%)was larger than that of extremely low birth weightinfants(15.84%).Among 427 pregnant women,77.75% were primipara,68.15% chose cesarean section.Among many obstetric factors lead-ing to very low birth weight infants and extremely low birth weight infants,severe preeclampsia was most important;premature rupture ofmembrane,placental abruption,cervical incompetence and amniotic fluid abnormality were also important.Conclusion The very low birthweight infants between 28 and 32 weeks were focal points for obstetrician and pediatrician.Primipara with severe preeclampsia,prematurerupture of membrane(PROM),placental abruption,cervical incompetence or amniotic fluid abnormality had high risk of very low birth weightinfants or extremely low birth weight infants.