G03AB04 norethisterone and ethinylestradiol

G GENITO URINARY SYSTEM AND SEX HORMONES

G03 SEX HORMONES AND MODULATORS OF THE GENITAL SYSTEM

G03A HORMONAL CONTRACEPTIVES FOR SYSTEMIC USE

G03AB Progestogens and estrogens systemic contraceptives, sequential preparations

G03AB04 norethisterone and ethinylestradiol