title: Maternal morbidity on 147 triplets: single institution experience.
abstract: OBJECTIVE
  To evaluate the incidence and characteristics of maternal complications in triple pregnancies. An additional objective was to study the relation between assisted reproductive techniques and maternal complications.
  
  
  METHODS
  Retrospective study on 147 triplets assisted at the Gynecology and Obstetrics department of La Paz University Hospital between 2000 and 2010. We analyzed the incidence of maternal complications and their relation to assisted reproductive techniques.
  
  
  RESULTS
  One triplet was observed every 711 pregnancies. The most frequent maternal complications were spontaneous preterm labor (56%), premature rupture of membranes (28.9%), anemia (24.4%) and preeclampsia (20.4%). Triplets conceived by assisted reproductive techniques were significantly more likely to develop spontaneous preterm labor than spontaneous pregnancies (60% vs. 40%, respectively; p = 0.045).
  
  
  CONCLUSIONS
  Triplets have a very high risk of maternal complications such as preeclampsia. Moreover, the presence of spontaneous preterm labor is more frequent in triplets conceived by assisted reproductive techniques than in those spontaneously conceived.
authors.affiliation: Obstetrics and Gynecology Department, La Paz University Hospital, Madrid, Spain.
authors.forename: Rocio
authors.initials: R
authors.lastname: Revello
authors.forename: María
authors.initials: M
authors.lastname: De la Calle
authors.forename: Elisa
authors.initials: E
authors.lastname: Moreno
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Duyos
authors.forename: Patricia
authors.initials: P
authors.lastname: Salas
authors.forename: Ignacio
authors.initials: I
authors.lastname: Zapardiel
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D015994:Incidence; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology* / Q000209:etiology; D059286:Pregnancy, Triplet / Q000706:statistics & numerical data*; D027724:Reproductive Techniques, Assisted / Q000009:adverse effects*; D012189:Retrospective Studies; D013030:Spain / Q000453:epidemiology; D014310:Triplets