Real prevention of gestosis is based on preclinical diagnosis taking into account absence of organic changes and prevalence of functional-dynamic disorders when their preventive therapy is the most effective. Functional disorders of internal organs are clinical reflection of general psycho-vegetative instability of an individual (his constitutional somatogenic or situationally conditioned emotional instability). From the reports of recent years, none of the works have highlighted certain individual psychological features of the pregnant woman - emotional instability, anxiety, sensitivity, etc., which are an essential part of the constitutional-biological predisposition.