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Twin-twin transfusion syndrome: a population-based study
Samawal Lutfi1, Victoria M Allen, John Fahey
1Neonatal Pediatrics Division, Department of Obstetrics and Gynaecology, Reproductive Care Program of Nova Scotia, Halifax, Nova Scotia, Canada. samawal_lufti@yahoo.com
Obstetrics and Gynecology
|December 2, 2004
Summary
Twin-twin transfusion syndrome (TTTS) increases twin mortality, but this is mainly due to preterm birth, not the condition itself or birth weight differences. Careful monitoring is crucial for affected pregnancies.
Area of Science:
- Perinatology
- Maternal-Fetal Medicine
- Neonatology
Background:
- Twin-twin transfusion syndrome (TTTS) is a serious complication of monochorionic diamniotic twin pregnancies.
- Understanding TTTS incidence and outcomes is vital for improving neonatal care.
Purpose of the Study:
- To determine the incidence, mortality, and morbidity rates of TTTS in a population-based cohort.
- To investigate the impact of gestational age and birth weight discordancy on TTTS outcomes.
Main Methods:
- Population-based cohort study of monochorionic diamniotic twins (gestation ≥20 weeks) in Nova Scotia (1988-2000).
- Analysis of mortality, 1-year survival, and various neonatal morbidities.
- Statistical adjustment for gestational age and birth weight discordancy (>20%).
Main Results:
- 48 of 404 monochorionic diamniotic twin pregnancies had TTTS.
- TTTS group had higher mortality, but this was not statistically significant after gestational age adjustment.
- No significant differences in 1-year survival or other morbidities after gestational age adjustment.
- Birth weight discordancy predicted morbid outcomes but lost significance post-adjustment.
Conclusions:
- Increased TTTS morbidity and mortality are primarily linked to a higher rate of preterm birth.
- Birth weight discordancy is not an independent predictor of mortality in TTTS when controlling for gestational age.