TY - GEN AU - Masson,S AU - Franssen,E AU - Hilditch,J R AU - Powell,M G TI - A clinical comparison of two triphasic oral contraceptives with levonorgestrel or norethindrone: a prospective, randomized, single-blind study SN - 0010-7824 PY - 1993///0323 KW - Adolescent KW - Adult KW - Contraceptives, Oral, Combined KW - pharmacology KW - Contraceptives, Oral, Sequential KW - Drug Combinations KW - Ethinyl Estradiol KW - Ethinyl Estradiol-Norgestrel Combination KW - Female KW - Humans KW - Menstruation KW - drug effects KW - Norethindrone KW - Norgestrel KW - Prospective Studies KW - Single-Blind Method N1 - Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't UR - https://doi.org/10.1016/0010-7824(93)90108-j ER -