G03AA13 norelgestromin and ethinylestradiol
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 estrogen systemic contraceptives, fixed combinations
G03AA13 norelgestromin and ethinylestradiol