in detail , the mechanism of action of the progesterone derivatives ( medroxyprogesterone acetate , chlormadinone acetate and cyproterone acetate ) , the norethisterone-related ( norethisterone , ethynodiol diacetate , lynestrenol and norethynodrel ) and the norgestrel-related progestogens ( levonorgestrel , desogestrel , gestodene and norgestimate ) , and a possible influence of some metabolites upon the biological profile are discussed .
C0028368
norgestrel
C0023566
levonorgestrel