Conjoined twins in a triplet pregnancy after intracytoplasmic sperm injection and blastocyst transfer: case report and review of the literature

To date, a small number of cases of conjoined twins in IVF/ICSI pregnancies have been reported, in which most cases were treated with manipulations causing possible trauma in the zona pellucida. Our case is unique in that the transferred embryos were blastocysts that might have had additional damage on the zona pellucida from the longer culture.