title: Selection of controls--always a challenge.
authors.forename: B
authors.initials: B
authors.lastname: Scoccia
authors.forename: K
authors.initials: K
authors.lastname: Elter
authors.forename: L R
authors.initials: LR
authors.lastname: Nelson
mesh_terms: D016022:Case-Control Studies; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000097:blood*; D006801:Humans; D007247:Infertility, Female / Q000097:blood / Q000175:diagnosis*; D008403:Mass Screening / Q000379:methods; D011237:Predictive Value of Tests; D011247:Pregnancy; D011379:Prognosis; D012372:ROC Curve; D012016:Reference Values; D015203:Reproducibility of Results
chemical_list: D005640:Follicle Stimulating Hormone