Figure 1. Representative results of microsatellite analysis, using leukocyte genomic DNA samples of the patient and the parents and placental genomic DNA samples. In cases 1 and 2, one of the two paternal peaks is inherited by the patients and the placentas, and no trace of maternal peaks is identified. In case 4, both paternally and maternally derived peaks are found in the patient, with the paternally derived long peak being larger than the maternally inherited short peak.