title: Pregnancy outcomes of mothers with very advanced maternal age (40 years or more).
abstract: OBJECTIVE
  To assess pregnancy outcomes in women at age of 40 years or more compared with those at age of 20 to 30 years.
  
  
  METHODS
  The retrospective cohort study was conducted at Maternal Fetal Medicine Unit, Chiang Mai University, Thailand, to identify the delivery. All consecutive records between January 2002 and December 2012 were searched. Singleton pregnancies with maternal age of 20 years or older were recruitedfor study. The primary outcomes for comparison were the rates of various obstetric outcomes, such aspreterm birth, cesarean section, etc.
  
  
  RESULTS
  During the study period, 797 women at age of 40 years or more and 18,802 women at age of between 20 and 30 years were recruited. Women in the study group had significantly higher rates of medical diseases, such as chronic hypertension or pregestational diabetes mellitus. Cesarean rate, preterm delivery, and fetal growth restriction were significantly higher in the study group.
  
  
  CONCLUSIONS
  Maternal age of 40 years or more is associated with medical complications and more operative deliveries. Furthermore, very advanced maternal age is significantly associated with adverse perinatal outcomes such as abortion, preterm birth, and fetal growth restriction. This information may be useful for obstetric counseling.
authors.forename: Kuntharee
authors.initials: K
authors.lastname: Traisrisilp
authors.forename: Theera
authors.initials: T
authors.lastname: Tongsong
mesh_terms: D000328:Adult; D002585:Cesarean Section; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D012307:Risk Factors; D013785:Thailand; D055815:Young Adult