title: Oestrogens and progesterone concentrations and risk of ectopic pregnancy: an epidemiological point of view.
authors.affiliation: Istituto di Ricerche Farmacologiche Mario Negri, Miláno, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Parazzini
mesh_terms: D004812:Epidemiologic Methods; D004967:Estrogens / Q000097:blood*; D005260:Female; D006801:Humans; D009994:Osmolar Concentration; D011247:Pregnancy; D011271:Pregnancy, Ectopic; D011374:Progesterone / Q000097:blood*; D012307:Risk Factors
chemical_list: D004967:Estrogens; D011374:Progesterone