[Genetic aspects of early spontaneous abortion]

Spontaneous abortions are the most frequent complications in pregnancy. Especially in early pregnancy abortions are often genetically caused. The most important role between chromosomal disorders play the Trisomy, Triploidy and X0-Monosomy. Against the background of more recent findings the frequency, origins of several genetic disorders and the morphological expression in placental tissue are discussed in this review. The chromosomal situation of hydatidiform and partial mole as well as the question for the causes of malignancy-tendence of complete moles from genetic view are also considered. The importance of the knowledge of genetic disorders to correlate the microscopic placental findings and the karyotype and to support medical consultation is referred, too.