Hypertensive disorders in twin pregnancies

W. Chaim, D. Fraser, M. Mazor, J. R. Leiberman

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This study investigates the influence of hypertensive disorders on twin pregnancies for an unselected, population-based series. Between 1986 and 1991, out of a total of 56,381, 766 (1.3%) were twin deliveries at our institution, the only tertiary care hospital serving a population of about 400,000 inhabitants. The incidence of hypertensive disorders was significantly higher in twin gestations than in singleton pregnancies, at 3437/55,615 (6.2%) vs 85/766 (11.1%) (p < 0.001, OR = 1.8, 95% CI = 1.4-2.3). Hypertensive disorders were significantly higher in twin as compared to singleton pregnancies, regardless of parity, and even after adjusting for maternal age. More instrumental or surgical deliveries were needed when pregnancies were complicated by hypertension, in twin as well as singleton gestations. Despite the association between prematurity and hypertensive disorders, and prematurity and perinatal mortality, no significant difference was found in perinatal mortality between hypertensive and normotensive twin pregnancies. The neonatal death-rate in normotensive and hypertensive twin pregnancies (3.7% and 3.5% respectively) was higher than that of stillbirths (respectively 2.3% and 0%).

Original languageEnglish
Pages (from-to)31-39
Number of pages9
JournalActa Geneticae Medicae et Gemellologiae
Issue number1
StatePublished - 1 Jan 1995
Externally publishedYes


  • hypertension
  • twin pregnancies

ASJC Scopus subject areas

  • Genetics(clinical)


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