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A comprehensive classification system for preterm birth requires expanded gestational boundaries that recognize the early origins of preterm parturition and emphasize fetal maturity over fetal age. Exclusion of stillbirths, pregnancy terminations, and multifetal gestations prevents comprehensive consideration of the potential causes and presentations of preterm birth. Any step in parturition (cervical softening and ripening, decidual-membrane activation, and/or myometrial contractions) may initiate preterm parturition, and should be recorded for every preterm birth, as should the condition of the mother, fetus, newborn, and placenta, before a phenotype is assigned.

Original publication

DOI

10.1016/j.ajog.2011.10.865

Type

Journal article

Journal

Am J Obstet Gynecol

Publication Date

02/2012

Volume

206

Pages

113 - 118

Keywords

Female, Humans, Infant, Newborn, Infant, Premature, Parturition, Pregnancy, Premature Birth, Stillbirth