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Monoamniotic Twin Pregnancy

Published online by Cambridge University Press:  01 August 2014

R.H. Lumme  and
S.V. Saarikoski
R.H. Lumme*
Affiliation:
Department of Obstetrics and Gynaecology, University of Tampere, Finland
S.V. Saarikoski
Affiliation:
Department of Obstetrics and Gynaecology, University of Tampere, Finland
*
Dept. of Obstetrics and Gynaecology, University of Tampere, Teiskontie, SF-33520 Tampere, Finland

Abstract

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The course and outcome of 23 monoamniotic (MA) twin pregnancies, delivered in Tampere University Central Hospital during the years 1964-1984, were studied retrospectively and compared to 1056 diamniotic (DA) twin pregnancies. The frequency of MA twins was 2.1% of twin pregnancies. Polyhydramnion complicated the pregnancy in 26% of MA vs 6% of DA pregnancies. Two cases were defined as acute polyhydramnion. Preterm labour was stated in 70% of MA pregnancies and deliveries before the 34th week were 4 times more common in MA than DA pregnancies. The cesarean section rate was more than double in MA pregnancies (39%). Entanglement of the umbilical cords was noted four times, and prolapse of the cord in three vaginally delivered cases. Perinatal mortality was 28% in MA vs 5% in DA twins. The most common causes of death were respiratory distress syndrome, congenital malformation and feto-fetal transfusion.

Keywords

Monoamniotic twinsCongenital malformationPerinatal mortalityPrematurity
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 35 , Issue 1-2 , April 1986 , pp. 99 - 105
Copyright
Copyright © The International Society for Twin Studies 1986

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