Objective: to study the regularities of postpartum blood biochemical changes in varying severity gestosis. Subjects and methods: thirty-five females were examined in the puerperium. Blood was taken on postpartum days 1 and 3—4. The parameters of hepatic and renal function and lipid parameters were determined. Results. Higher levels of creatitine and urea and a more pronounced increase in the concentration of triglycerides and very low-density lipoproteins were observed in moderate gestosis than in normal physiological pregnancy. All the examinees were recorded to have low total protein levels within the first 24 hours after labor. Parturient women with moderate gestosis showed negative changes in protein concentrations throughout the study. Severe gestosis was characterized by multiple increases in bilirubin concentrations and, in case of death, these are also added by higher alanine aminotransferase and aspartate aminotransferase activities. Conclusion. Hypoproteinemia, hypocalcemia, elevated levels of triglycerides and very low-density lipoproteins and a simultaneous decrease in high-density lipoproteins are preserved in moderate gestosis in the early puerperium.