[Studies on the binding capacity of thyroxin-binding globulin (TBC), total thyroxin (T4), free thyroxin index (FT4-I) and the ETR-test in gestosis and placental insufficiency].

Total serum thyroxine (T4), thyroxine binding capacity (TBC), free thyroxine index (FT4-I) and effective thyroxine ratio (ETR) were measured in 53 toxemias of pregnancy and in 5 cases with placental insufficiency. Total serum thyroxine, ETR and FT4-I were found in physiological ranges of the normal pregnancy, the TBC-index was decreased. Between the 19. and 34. week of pregnancy, the decrease of the TBC-index was smaller than after the 34. week of pregnancy.