Neonatal complications of term pregnancy: Rates by gestational age increase in a continuous, not threshold, fashion

The purpose of this study was to determine whether, when, and how rates of short-term neonatal complications increase beyond 37 weeks of gestation. A retrospective cohort study was conducted of all low-risk, term, cephalic, and singleton births that were delivered at the University of California, Sa...

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Bibliographic Details
Published in:American journal of obstetrics and gynecology 2005, Vol.192 (1), p.185-190
Main Authors: Caughey, Aaron B., Washington, A. Eugene, Laros, Russell K.
Format: Article
Language:English
Subjects:
Adult
Apgar Score
Biological and medical sciences
California - epidemiology
Cohort Studies
Diseases of mother, fetus and pregnancy
Female
Fetal Blood
Fetal Macrosomia
Gestational Age
Gynecology. Andrology. Obstetrics
Humans
Hydrogen-Ion Concentration
Infant, Newborn
Intensive Care Units, Neonatal - utilization
Meconium
Medical Records
Medical sciences
Perinatal morbidity
Postdates pregnancy
Postterm pregnancy
Pregnancy
Pregnancy Complications - epidemiology
Pregnancy Complications - etiology
Pregnancy Outcome
Pregnancy, Prolonged
Pregnancy. Fetus. Placenta
Retrospective Studies
Socioeconomic Factors
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Summary:The purpose of this study was to determine whether, when, and how rates of short-term neonatal complications increase beyond 37 weeks of gestation. A retrospective cohort study was conducted of all low-risk, term, cephalic, and singleton births that were delivered at the University of California, San Francisco, between 1976 and 2001. Primary outcomes included neonatal umbilical artery pH, umbilical artery base excess, the presence of meconium, macrosomia, 5-minute Apgar scores, and admission to the intensive care nursery. Multivariate analyses were performed that controlled for maternal ethnicity, weight, age, socioeconomic status, and obstetric history. Among the 32,679 women who were delivered at ≥37 completed weeks of gestation, the rates of umbilical artery pH
ISSN:0002-9378
1097-6868
DOI:10.1016/j.ajog.2004.06.068