[Comparative evaluation of the effect of mono-, bi- and three-phase oral contraceptive tablets on the endometrium].

It was established that the applied new pill has no atrophic effect onto the endometrium. Therefore it has better characteristics than other oral contraceptives (excepting Anteovin). Ovidon e.g. causes endometrial atrophy (concerning glands and stroma as well), when it is used for several years. We can expect the triphasis pill not to results any endometrial atrophy or hyperprolactinaemia not even in long term use. High progesterone levels detected in serum during pill administration refer to this fact.