Fig. 4From: Molecular cytogenetic analysis of a hydatidiform mole with coexistent fetus: a case reportThe speculated pathogenic mechanism in the present case. For one of the twins, a triploid embryo formed by dispermy, followed by diploidization of the embryo by somatic cell division; then, a normal placenta and fetus developed from cells with Mat+Pat1, and a hydatidiform mole developed from cells with Pat1 + Pat2Back to article page