title: Absent end-diastolic flow velocity waveforms in the umbilical artery--the subsequent pregnancy.
abstract: OBJECTIVE
  Our purpose was to assess the recurrence risk, course, and outcome of subsequent pregnancies in women with absent umbilical end-diastolic velocity.
  
  
  METHODS
  Absent umbilical end-diastolic velocity was detected in 88 women. Sixteen of them were prospectively followed up in their 19 subsequent pregnancies. These pregnancies were compared with their index pregnancies.
  
  
  RESULTS
  The index pregnancy was invariably complicated with a perinatal mortality of 56%, growth restriction in 94% (15/16), and prematurity in 100% (75% < 32 weeks' gestation). In contrast, the outcome of the subsequent pregnancies was much better, and 74% (14/19) were uncomplicated. No perinatal deaths occurred, and none were delivered before 32 weeks' gestation. Absent umbilical end-diastolic velocity recurred in only two pregnancies, both of which were complicated. Six women had autoantibodies; these accounted for 80% (4/5) of subsequent complicated pregnancies.
  
  
  CONCLUSIONS
  After an index pregnancy with absent umbilical end-diastolic velocity, subsequent pregnancies had favorable outcomes. Recurrence of absent umbilical end-diastolic velocity was low. The absence of autoantibodies and normal Doppler studies were associated with improved outcome.
authors.affiliation: Perinatal Unit, Mount Sinai Hospital, University of Toronto Perinatal Complex, Ontario, Canada.
authors.forename: D
authors.initials: D
authors.lastname: Farine
authors.forename: G
authors.initials: G
authors.lastname: Ryan
authors.forename: E N
authors.initials: EN
authors.lastname: Kelly
authors.forename: R J
authors.initials: RJ
authors.lastname: Morrow
authors.forename: C
authors.initials: C
authors.lastname: Laskin
authors.forename: J W
authors.initials: JW
authors.lastname: Ritchie
mesh_terms: D000328:Adult; D001323:Autoantibodies / Q000032:analysis; D001783:Blood Flow Velocity; D003971:Diastole; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications; D011256:Pregnancy Outcome; D012212:Rheology; D014463:Ultrasonography; D014469:Umbilical Arteries / Q000000981:diagnostic imaging / Q000503:physiopathology*
chemical_list: D001323:Autoantibodies