title: Natural and synthetic oestrogenic substances; their relative effectiveness when administered orally.
authors.forename: A B V
authors.initials: AB
authors.lastname: RYDEN
mesh_terms: D000728:Androgens; D003271:Contraceptive Agents, Female; D045166:Estradiol Congeners; D004967:Estrogens; D005260:Female; D006801:Humans
chemical_list: D000728:Androgens; D003271:Contraceptive Agents, Female; D045166:Estradiol Congeners; D004967:Estrogens
keywords: ANDROGENS; ESTROGENS