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9. Ovarian function during treatment with high ratio levonorgestrel/ethinyl estradiol as oral contraceptives. Johansson ED, Elamsson K, Elmestedt U. Gynecol Obstet Invest; 1982 Jun; 14(2):97-105. PubMed ID: 6811379 [No Abstract] [Full Text] [Related]
10. [Oral contraceptives: 30 vs 20 micrograms of ethinyl estradiol (EE)]. Urdinola J. Adv Contracept; 1994 Jul; 10 Suppl 1():41-9. PubMed ID: 7839871 [No Abstract] [Full Text] [Related]