Antenatal detection of Meckel-Grüber syndrome in only one dizygotic twin following in vitro fertilization and embryo transfer.

The first case of Meckel-Grüber syndrome in a dizygotic twin pregnancy following in vitro fertilization and embryo transfer is reported. An ultrasound examination at 26 weeks of gestation revealed multiple malformations of the presenting twin: the combination of an occipital encephalomeningocele, bilateral polycystic kidneys and postaxial polydactyly was suggestive of Meckel-Grüber syndrome. Diagnosis was confirmed after birth. The importance of this case is stressed since particular care must be taken to avoid multiple pregnancies in couples at risk undergoing assisted reproduction.