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Relative contribution of ovarian stimulation versus in vitro fertilization and intracytoplasmic sperm injection to multifetal pregnancies requiring reduction to twins.

Ombelet W, Camus M, de Catte L

Genk Institute for Fertility Technology, Department of Obstetrics and Gynaecology, Genk, Belgium. willem.ombelet@telenet.be

The proportion of twins resulting from multifetal pregnancy reduction of higher-order multiples is increased in pregnancies resulting from hormone stimulation when compared with twins following in vitro fertilization/intracytoplasmic sperm injection treatment. These reduced twin pregnancies may carry a higher perinatal risk compared with other twin pregnancies, which should be taken into account when assessing the perinatal outcome of twin pregnancies after assisted reproduction.

Published 8 October 2007 in Fertil Steril, 88(4): 997-9.
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