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Published online by Cambridge University Press: 01 August 2014
Premature delivery is 3-4 times higher in multiple pregnancy. About 12% of all premature infants result from twin pregnancies. Multiple pregnancy is therefore considered as a high-risk pregnancy, involving intensive care of the pregnant woman. The occurrence of toxicosis in twin pregnancies has in this way been reduced to almost 10%. The maturity or immaturity of twins seems to be qualified according to the weight of each single twin, irrespective of the twin partner. Small-for-date babies may be frequently found in twin pregnancies.