First trimester diagnosis of conjoined twins in a triplet pregnancy after IVF and ICSI

A case of conjoined twins in a triplet pregnancy after in-vitro fertilizati on and intracytoplasmic sperm injection is described. The diagnosis was mad e by high-resolution vaginal sonography, as early as the eighth week of ges tation, The third fetus, of different chorionicity, was normal. Selective t ermination was successfully done at 12 weeks. The possible association betw een assisted reproduction and conjoined twinning is discussed. The importan ce of expert early vaginal sonography of pregnancy resulting from assisted reproduction technology is emphasized.