title: Small-for-gestational-age babies of low-risk term pregnancies: does antenatal detection matter?
abstract: OBJECTIVE
  To compare delivery route and admission rate to neonatal intensive care unit between small- and appropriate-for-gestational-age babies among low-risk term pregnancies.
  
  
  METHODS
  A retrospective study was conducted using the database of deliveries in 2014 at a tertiary hospital. Babies delivered at ≥37 weeks with birthweight <10th centile were considered small-for-gestational-age (SGA) and >90th centile were considered large-for-gestational-age. Fetal weight estimation at 30-33 weeks ultrasound <10th centile was considered antenatal detection of SGA.
  
  
  RESULTS
  Among 1429 low-risk term pregnancies, 11% (151/1429) had SGA babies and 5% (75/1429) had large-for-gestational-age. SGA babies were associated with higher rate of cesarean sections for nonreassuring fetal status (18/151 versus 8/1202, p < .001) and higher rate of admissions to neonatal intensive care unit (16/151 versus 18/1202, p < .001) compared to appropriate-for-gestational-age. Within SGA group, antepartum detected fetuses were associated with lower rate of operative deliveries for nonreassuring fetal status than undetected group (3/31 versus 39/120, p = .01) Conclusions: In our series, women with SGA term babies were associated with more adverse obstetric and neonatal outcome than appropriate-for-gestational age, especially among those undetected prenatally.
authors.affiliation: a Department of Obstetrics and Gynecology , CHLN-Hospital Universitário de Santa Maria , Lisbon , Portugal.
authors.forename: Catarina
authors.initials: C
authors.lastname: Policiano
authors.affiliation: a Department of Obstetrics and Gynecology , CHLN-Hospital Universitário de Santa Maria , Lisbon , Portugal.
authors.forename: Andreia
authors.initials: A
authors.lastname: Fonseca
authors.affiliation: b NOVAIMS, Universidade Nova de Lisboa , Lisbon , Portugal.
authors.forename: Jorge M
authors.initials: JM
authors.lastname: Mendes
authors.affiliation: a Department of Obstetrics and Gynecology , CHLN-Hospital Universitário de Santa Maria , Lisbon , Portugal.
authors.forename: Nuno
authors.initials: N
authors.lastname: Clode
authors.affiliation: c Faculdade de Medicina da Universidade de Lisboa, CAM-Centro Académico de Medicina de Lisboa , Lisbon , Portugal.
authors.forename: Luís M
authors.initials: LM
authors.lastname: Graça
mesh_terms: D000328:Adult; D036861:Delivery, Obstetric / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007236:Infant, Small for Gestational Age; D011174:Portugal / Q000453:epidemiology; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000453:epidemiology*; D012189:Retrospective Studies; D016216:Ultrasonography, Prenatal; D055815:Young Adult
keywords: Small-for-gestational-age; antenatal screening; cesarean delivery; neonatal intensive care unit admission; nonreassuring fetal status