title: Effects of a single course of corticosteroids given more than 7 days before birth: a systematic review.
abstract: OBJECTIVE
  To determine the risk of fetal, neonatal and maternal mortality and morbidity for women and their infants who remained undelivered more than 7 days following a course of prenatal corticosteroids.
  
  
  METHODS
  Systematic review.
  
  
  METHODS
  Women who gave birth more than 7 days after a course of prenatal corticosteroids compared with women not administered corticosteroids.
  
  
  METHODS
  Seven randomised controlled trials were identified which reported outcomes for women and their babies who remained undelivered more than 7 days after exposure to a single course of corticosteroids compared with a placebo/no treatment group.
  
  
  METHODS
  Fetal, neonatal and maternal mortality and morbidity.
  
  
  RESULTS
  Seven trials involving 862 infants, 434 born to corticosteroid treated women and 428 to control women were included in this review. For corticosteroid treated infants there was no reduction in the risk of respiratory distress syndrome (relative risk (RR), 0.72; 95% confidence interval (CI), 0.49-1.07), or stillbirth (RR, 1.67; 95% CI, 0.86-3.25). However, there was a tripling in risk of death for liveborn corticosteroid treated infants (RR, 3.24; 95% CI, 1.32-7.96; P = 0.01), and a doubling in risk of perinatal mortality (RR, 2.13; 95% CI, 1.27-3.57; P < 0.01). Corticosteroid treated infants were born on average 5 days earlier than controls (95% CI, -9.15 to -0.85 days, P = 0.02). Their mothers were more likely to have chorioamnionitis (RR, 2.91; 95% CI, 1.25-6.74; P = 0.01).
  
  
  CONCLUSIONS
  Infants exposed to corticosteroids more than 7 days before birth had no reduction in risk of respiratory distress syndrome but increased perinatal mortality.
authors.affiliation: Department of Obstetrics and Gynaecology, Adelaide University, Adelaide, Australia.
authors.forename: Kristin J
authors.initials: KJ
authors.lastname: McLaughlin
authors.forename: Caroline A
authors.initials: CA
authors.lastname: Crowther
authors.forename: Natalie
authors.initials: N
authors.lastname: Walker
authors.forename: Jane E
authors.initials: JE
authors.lastname: Harding
mesh_terms: D000328:Adult; D001623:Betamethasone / Q000627:therapeutic use*; D005260:Female; D005938:Glucocorticoids / Q000627:therapeutic use*; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D011247:Pregnancy; D011256:Pregnancy Outcome; D016032:Randomized Controlled Trials as Topic; D012127:Respiratory Distress Syndrome, Newborn / Q000517:prevention & control; D013997:Time Factors
chemical_list: D005938:Glucocorticoids; D001623:Betamethasone