[The effect of oral contraceptives on levels of thyroid hormone, blood coagulation and ceruloplasmin (author's transl)].

The effect of various hormonal contraceptives on the thyroid hormone level, plasmatic and thrombocytic coagulation, cholesterol and ceruloplasmin levels and the activity of gamma-glutamyl transpeptidase was investigaged by the changes produced by long term cyclic estrogen-gestagen therapy on the metabolism of the organism. The free thyroxine index and the total cholesterol were within the normal range. The thyroxine binding index at 44% was above the normal level and the mean value was significantly raised. The ceruloplasmin concentration in the serum was also significantly increased. Pointers to a general hypercoagulability could not be ascertained with a statistical significance.