title: Endogenous estradiol and progesterone concentrations in smokers on oral contraceptives.
abstract: The simultaneous effects of cigarette smoking and oral contraceptives on serum estradiol and progesterone levels were investigated in 114 premenopausal women. Serum 17 beta-estradiol and progesterone levels were measured by radioimmunoassay. In smokers, estradiol and progesterone levels were significantly lower (p less than 0.025). In smokers using oral contraceptives, estradiol and progesterone levels were the lowest (p less than 0.001 and p less than 0.01, respectively). The findings suggest that smoking and oral contraceptives independently lower serum estradiol and progesterone concentrations in premenopausal women and that the effects may be additive.
authors.affiliation: Department of Obstetrics and Gynecology, Albert Einstein College of Medicine, Bronx, NY 10461.
authors.forename: J
authors.initials: J
authors.lastname: Basu
authors.forename: M S
authors.initials: MS
authors.lastname: Mikhail
authors.forename: P R
authors.initials: PR
authors.lastname: Palan
authors.forename: B
authors.initials: B
authors.lastname: Thysen
authors.forename: E
authors.initials: E
authors.lastname: Bloch
authors.forename: S L
authors.initials: SL
authors.lastname: Romney
mesh_terms: D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000494:pharmacology*; D004958:Estradiol / Q000097:blood*; D005069:Evaluation Studies as Topic; D005260:Female; D006773:Hospitals, Municipal; D006801:Humans; D009519:New York City / Q000453:epidemiology; D011374:Progesterone / Q000097:blood*; D012907:Smoking / Q000097:blood* / Q000453:epidemiology
chemical_list: D003276:Contraceptives, Oral; D011374:Progesterone; D004958:Estradiol