“…KAUFMANN [8,10] introduced the classification into mature, predegenerative, and degenerative syncytium äs well äs varying forms of differentiation of LANGHANS cells with the methodology of counterstained enzyme-incubated semi-thin sections combining histochemical reactions and the observation of structural and cytologic changes. It has been demonstrated quantitatively that in various forms of high-risk pregnancies [8,33,34,35], intrauterine growth retardation and prematurity [20,21] a functional and morphological trophoblast disturbance is always present. Based on our own quantitative results [24] we will discuss die question of the measureability of clinical forms of placental insufficiency at the chorion epithelium of placental resorption villi.…”