title: Obstetric outcomes in nulliparous women aged 35 and over with singleton pregnancies conceived by in vitro fertilization.
abstract: OBJECTIVE
  To investigate obstetric outcomes in singleton pregnancies conceived by in vitro fertilization (IVF) to nulliparous women older than 35 compared to those of their younger counterparts.
  
  
  METHODS
  Nulliparous women 35 years and older at delivery conceived by IVF (n = 89) were compared with nulliparous women 34 years and younger at delivery conceived by IVF (n = 48). Data included antenatal data, gestational age at delivery, maternal and neonatal complications and mode of delivery.
  
  
  RESULTS
  The incidence of pregnancy-induced hypertension in the younger group was significantly higher than that in the elderly group (13 vs. 3.4%, P = 0.043). There were no measurable differences in other obstetric outcomes such as placental abnormality, premature delivery or neonatal asphyxia between the two groups.
  
  
  CONCLUSIONS
  The current results suggest that obstetric complications in pregnancies conceived IVF are attributed to mechanisms other than those depend on advanced maternal age.
authors.affiliation: Department of Obstetrics and Gynecology, Japanese Red Cross Katsushika Maternity Hospital, 5-11-12 Tateishi, Katsushika-ku, Tokyo, Japan. czg83542@mopera.ne.jp
authors.forename: Shunji
authors.initials: S
authors.lastname: Suzuki
authors.forename: Hidehiko
authors.initials: H
authors.lastname: Miyake
mesh_terms: D000328:Adult; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D046110:Hypertension, Pregnancy-Induced / Q000453:epidemiology; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007564:Japan / Q000453:epidemiology; D008423:Maternal Age; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies