title: Clinical significance of pregnancies with succenturiate lobes of placenta.
abstract: OBJECTIVE
  This study examined the clinical significance of patients complicated by succenturiate lobes of placenta in comparison with patients with normal placenta.
  
  
  METHODS
  Data were collected from 47 patients complicated by succenturiate lobes of placenta and from 7,666 unaffected controls.
  
  
  RESULTS
  The frequency of maternal age > or =35 years and history of using in vitro fertilization in patients complicated by succenturiate lobes of placenta were significantly higher than those in control patients (P < 0.01). In addition, the incidence of non-reassuring fetal status, vasa previa, postpartum hemorrhage and retained placenta in the study group were significantly higher than those in control (P < 0.01).
  
  
  CONCLUSIONS
  These results support the adverse obstetric outcomes in pregnancies with succenturiate lobes of placenta and may suggest the pathogenesis of these placental shape aberrations associated with assisted reproductive technology.
authors.affiliation: Department of Obstetrics and Gynecology, Japanese Red Cross Katsushika Maternity Hospital, Katsushika-ku, Tokyo, 124-0012, Japan. czg83542@mopera.ne.jp
authors.forename: Shunji
authors.initials: S
authors.lastname: Suzuki
authors.forename: Miwa
authors.initials: M
authors.lastname: Igarashi
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D005307:Fertilization in Vitro / Q000009:adverse effects*; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008423:Maternal Age; D008875:Middle Aged; D010922:Placenta Diseases / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D011256:Pregnancy Outcome; D027724:Reproductive Techniques, Assisted / Q000009:adverse effects*