Penava D, Natale R. An association of chorionicity with preterm twin birth.
JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2005;
26:571-4. [PMID:
15193202 DOI:
10.1016/s1701-2163(16)30375-9]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE
To assess the risk factors for preterm birth in twin pregnancies, particularly monochorionicity.
METHODS
A cohort study of 767 sets of twins, each twin weighing more than 500 g, born between January 1, 1992, and December 31, 2001, at St. Joseph's Health Care in London, Ontario. Statistical analysis was performed using forward stepwise logistic regression models, with gestational age at birth less than 28 or 32 weeks as the outcome.
RESULTS
Polyhydramnios and chorioamnionitis were significant risk factors for preterm birth prior to 28 or 32 weeks' gestation. Monochorionicity was a risk factor for preterm birth prior to 32 weeks' gestation. Past term birth and maternal age over 30 years were associated with reduced risk for preterm birth.
CONCLUSION
Monochorionic placentation is a significant risk factor for preterm twin birth.
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