research Acne Resolution Rates: Results of a Single-Blind, Randomized, Controlled, Parallel Phase III Trial with EE/CMA (Belara®) and EE/LNG (Microgynon®)
This study found that the monophasic oral contraceptive ethinylestradiol/chlormadinone acetate was more effective in treating mild to moderate papulopustular acne in women than ethinylestradiol/levonorgestrel.

