Efficacy, cycle control, and side effects of low- and lower-dose oral contraceptives: a randomized trial of 20 μg and 35 μg estrogen preparations

Chasan-Taber, 1998, Epidemiology of oral contraceptives and cardiovascular disease, Ann Intern Med, 128, 467, 10.7326/0003-4819-128-6-199803150-00008

Rosenberg, 1997, Modern oral contraceptives and cardiovascular disease, Am J Obstet Gynecol, 177, 707, 10.1016/S0002-9378(97)70168-6

Rosenberg, 1995, Use and misuse of oral contraceptives, Contraception, 51, 283, 10.1016/0010-7824(95)00074-K

Rosenberg, 1988, Oral contraceptive discontinuation, Am J Obstet Gynecol, 179, 577, 10.1016/S0002-9378(98)70047-X

Rosenberg, 1995, Compliance and oral contraceptives, Contraception, 52, 137, 10.1016/0010-7824(95)00161-3

Rosenberg, 1998, Compliance, counseling, and method satisfaction with oral contraceptives, Fam Plann Perspect, 30, 89, 10.2307/2991665

Rosenberg, 1995, Unplanned pregnancies due to oral contraceptive use, misuse, and discontinuation, J Reprod Med, 40, 355

Thorneycraft, 1999, Cycle control with oral contraceptives, Am J Obstet Gynecol, 180, S280, 10.1016/S0002-9378(99)70719-2

Rosenberg, 1992, Oral contraceptives and cycle control, Adv Contraception, 8, 35, 10.1007/BF01849449

Schilling, 1989, Evaluation of the clinical performance of three triphasic oral contraceptives, Am J Obstet Gynecol, 160, 1264, 10.1016/S0002-9378(89)80011-0

Droegmueller, 1989, Triphasic randomized clinical trial, Am J Obstet Gynecol, 161, 1407, 10.1016/0002-9378(89)90705-9

Rosenberg, 1996, Smoking and cycle control among oral contraceptive users, Am J Obstet Gynecol, 24, 628, 10.1016/S0002-9378(96)70440-4

Baron, 1990, The antiestrogenic effect of cigarette smoking in women, Am J Obstet Gynecol, 162, 502, 10.1016/0002-9378(90)90420-C

Akerlund, 1993, Comparative profiles of reliability, cycle control, and side effects of two oral contraceptive formulations containing 150 μg desogestrel and either 30 μg or 20 μg ethinyl oestradiol, Br J Obstet Gynaecol, 100, S32, 10.1111/j.1471-0528.1993.tb14309.x

Endrikat, 1997, A twelve-month comparative clinical investigation of two low-dose oral contraceptives containing 20 μg ethinylestradiol/75 μg gestodene and 30 μg ethinylestradiol/75 μg gestodene with respect to efficacy, cycle control, and tolerance, Contraception, 55, 131, 10.1016/S0010-7824(97)00025-5

Sulak, 1999, Clinical comparison of triphasic norgestimate/35 μ ethinyl estradiol and monophasic norethindrone acetate/20 μg ethinyl estradiol, Contraception, 59, 161, 10.1016/S0010-7824(99)00026-8

Chavez, 1999, A comparison of cycle control with monophasic levonorgestrel/ethinylestradiol 100 μg/20 μg versus triphasic norethindrone/estradiol 500-750–1000 μg/35 μg, Eur J Contracep Reprod Health Care, 4, 75, 10.3109/13625189909064008

Trends in oral contraceptive prescribing: an update. Contracept Rep 1999;12–14.

Cutler, 1958, Maximum utilization of the life table method in analyzing survival, J Chron Dis, 8, 699, 10.1016/0021-9681(58)90126-7

Higgins, 1985, Statistical comparison of Pearl rates, Am J Obstet Gynecol, 151, 656, 10.1016/0002-9378(85)90158-9

Koch, 1986, Poisson Regression, 7, 32

Kruskal, 1952, Use of ranks in one-criterion variance analysis, J Am Statist Assn, 47, 583, 10.2307/2280779

Lammers, 1991, Phase III clinical trial with a new oral contraceptive containing 150 μg desogestrel and 20 μg ethinylestradiol, Acta Obstet Gynecol Scand, 70, 497, 10.3109/00016349109007167

Archer, 1997, A new low-dose monophasic combination oral contraceptive (Alesse) with levonorgestrel 100 micrograms and ethinyl estradiol 20 micrograms, Contraception, 55, 139, 10.1016/S0010-7824(97)00024-3

1998, An open-label multicenter noncomparative safety and efficacy study of Mircette, a low-dose estrogen-progestin oral contraceptive, Am J Obstet Gynecol, 179, S2, 10.1016/S0002-9378(98)70290-X

Abma, 1997, Fertility, family planning, and women’s health, Vital Health Stat, 23, 51