title: The nature of circulating estrogen.
authors.forename: C M
authors.initials: CM
authors.lastname: SZEGO
authors.forename: S
authors.initials: S
authors.lastname: ROBERTS
mesh_terms: D003271:Contraceptive Agents, Female; D045166:Estradiol Congeners; D004967:Estrogens; D005260:Female; D006801:Humans
chemical_list: D003271:Contraceptive Agents, Female; D045166:Estradiol Congeners; D004967:Estrogens
keywords: ESTROGENS/circulating