 , G03FA — Progestogens and estrogens, fixed combinations , G03F — PROGESTOGENS AND ESTROGENS IN COMBINATION , G03 — SEX HORMONES AND MODULATORS OF THE GENITAL SYSTEM , G — GENITO URINARY SYSTEM AND SEX HORMONES , G03DA — Pregnen (4) derivatives , G03D — PROGESTOGENS , G03 — SEX HORMONES AND MODULATORS OF THE GENITAL SYSTEM , G — GENITO URINARY SYSTEM AND SEX HORMONES