the effect of a triphasic combination of ethinyl estradiol and levonorgestrel upon various lipoprotein parameters was compared to that of a preparation that contained ethinyl estradiol and desogestrel on days 6 , 11 , 21 , and 28 of a control cycle , the third cycle of treatment with either ethinyl estradiol/levonorgestrel or ethinyl estradiol/desogestrel ( 11 volunteers each ) , the third cycle of a 3-month washout period , and the third treatment cycle after crossover change of the preparations .
C0717761
ethinyl
C0015011
ethinyl estradiol