title: Statistical and logical considerations in evaluating the association of prenatal folic-acid supplementation with pregnancy loss.
authors.forename: E B
authors.initials: EB
authors.lastname: Hook
mesh_terms: D000022:Abortion, Spontaneous / Q000209:etiology* / Q000517:prevention & control*; D004305:Dose-Response Relationship, Drug; D005260:Female; D005313:Fetal Death / Q000209:etiology* / Q000517:prevention & control*; D005492:Folic Acid / Q000627:therapeutic use*; D006801:Humans; D011247:Pregnancy; D012306:Risk; D013997:Time Factors; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins; D005492:Folic Acid