Anatomical Therapeutic Chemical (ATC) classification [BR:br08303]
G GENITO URINARY SYSTEM AND SEX HORMONES
G03 SEX HORMONES AND MODULATORS OF THE GENITAL SYSTEM
G03A HORMONAL CONTRACEPTIVES FOR SYSTEMIC USE
G03AA Progestogens and estrogens, fixed combinations
G03AA15 Chlormadinone and ethinylestradiol
D04464 Chlormadinone acetate and mestranol
G03F PROGESTOGENS AND ESTROGENS IN COMBINATION
G03FB Progestogens and estrogens, sequential preparations
G03FB03 Chlormadinone and estrogen
D04464 Chlormadinone acetate and mestranol