title: THE CONCENTRATION OF OESTROGENS IN THE PERIPHERAL BLOOD OF WOMEN DURING THE NORMAL MENSTRUAL CYCLE AND IN THE FIRST TRIMESTER OF PREGNANCY.
mesh_terms: D035843:Biomedical Research; D001769:Blood; D004958:Estradiol; D004964:Estriol; D004967:Estrogens; D004970:Estrone; D005260:Female; D006801:Humans; D008597:Menstrual Cycle; D008598:Menstruation; D011247:Pregnancy; D011261:Pregnancy Trimester, First
chemical_list: D004967:Estrogens; D004970:Estrone; D004958:Estradiol; D004964:Estriol
keywords: BLOOD; CLINICAL RESEARCH; ESTRADIOL; ESTRIOL; ESTRONE; MENSTRUATION; PREGNANCY