Victor A, Lithell H, Selinus lngemar, Vessby B. Pharmacodynamics of a Contraceptive Vaginal Ring Releasing Norethindrone and Estradiol: Ovarian Function, Bleeding Control and Lipoprotein Patterns. ujms [Internet]. 1984Jun.1 [cited 2024Nov.27];89(2):179-88. Available from: https://ujms.net/index.php/ujms/article/view/7023