The aim of our study was a comprehensive search of an optimum quantitative and qualitative composition of organic compounds needed for the stabilization of the human chorionic gonadotropin (hCG). As a result of the conducted investigations, it has been established that, with the samples of chorionic gonadotropin containing L-lysine kept in a thermostat at a temperature of 40°C during 8 weeks, the most stable concentration of the gonadotropin was found in the samples of the experimental series containing 10 mg/cm3 of L-lysine – over 54 per cent of the initial theoretic concentration of hCG. In the conditions of a prolonged conservation of the gonadotropin in the samples containing L-glycine, variations of the concentration of native gonadotropin are observed in all series of samples; yet the final results demonstrate that L-glycine added in the quantity of 0.2 mg/cm3 has the most pronounced stabilizing effect. Conservation of samples containing 0.2 mg/cm3 of L-methionine provides a relatively high and stable activity of gonadotropin during 6 weeks of conservation. The concentration of native hCG in this series of samples during this period of conservation was about 50%.