[Contact microscopic and histochemical studies of the placenta in normal and pathological pregnancy].

The placenta was studied in 70 women: 19 of them had physiological pregnancy and 51 had pregnancy complicated with late toxicosis. Lesions in the placenta have been shown to increase with the growing severity of toxicosis, and compensatory potencies--to decrease. In late toxicosis the expansion of desorganization and reparation in the placenta occurs from the center towards periphery, the peripheral parts playing the role of reserved zones of the placenta, keeping high functional activity.