[Measurement of serum activity in short and long-term application of various hormonal contraceptives]

The influence of several oral contraceptives on various serum enzymes was tested during a short-term and a prolonged (24 therapeutic cycles) application period. A total of 8,790 examinations was performed in 211 females, each patient being examined up to 8 times during the cycles 0, 1, 3, 6, 12, 18, 24 and the first cycle following termination of oral contraception. Since sufficiently sensitive steroid-dependent makers are lacking, it cannot be dispensed with determining the serum enzymes gamma-GT, GPT, GOT, and LAP altogether, in order to detect early damage of the liver.