^Endrikat J, Gerlinger C, Richard S, Rosenbaum P, Düsterberg B. Ovulation inhibition doses of progestins: a systematic review of the available literature and of marketed preparations worldwide. Contraception. December 2011, 84 (6): 549–57. PMID 22078182. doi:10.1016/j.contraception.2011.04.009.
^Spona J, Schneider WH, Bieglmayer C, Schroeder R, Pirker R. Ovulation inhibition with different doses of levonorgestrel and other progestogens: clinical and experimental investigations. Acta Obstet Gynecol Scand Suppl. 1979, 88: 7–15. PMID 393050. S2CID 30486799. doi:10.3109/00016347909157223.
^Spona J, Huber J, Schmidt JB. Inhibierung der Ovulation mit 35 μg Athinylöstradiol und 2 mg Cyproteronazetat (Diane®-35) [Inhibition of ovulation with 35 micrograms of ethinyl estradiol and 2 mg of cyproterone acetate (Diane 35)]. Geburtshilfe Frauenheilkd. July 1986, 46 (7): 435–8. PMID 3093307. doi:10.1055/s-2008-1026659(德语).
^Spona J, Huber J. Efficacy of low-dose oral contraceptives containing levonorgestrel, gestoden and cyproterone acetate. Gynecol Obstet Invest. 1987, 23 (3): 184–93. PMID 2954886. doi:10.1159/000298860.
^Spona, J.; Huber, J.; Schmidt, J. B. Ovulation inhibitory effect of SH B 209 AE (Diane-35)—a new antiandrogen-estrogen combination. Schindler, Adolf E. (编). Antiandrogen-Estrogen Therapy for Signs of Androgenization. Berlin, Boston: De Gruyter. 1987-12-31: 51–58. ISBN 9783110866902. doi:10.1515/9783110866902-006.
Note: Though not listed here, many anabolic steroids can also be estrogenic as they can be aromatized into estrogen-like metabolites that possess estrogenic activity.