Figure 2From: Monochorionic-triamniotic triplet pregnancy after intracytoplasmic sperm injection, assisted hatching, and two-embryo transfer: first reported case following IVFDerom's developmental hypothesis (1987) of multiple births as a function of embryo fission (splitting) events and blastocyst implantation. Delivery outcomes assume 100% implantation. The incidence of human MZ triplets (black box) is estimated at 1:6400 deliveries. DZ = dizygotic MZ = monozygotic.Back to article page