title: Folic acid supplementation is not associated with an increase in dizygotic twinning.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Berry
authors.forename: Reinhold
authors.initials: R
authors.lastname: Kihlberg
mesh_terms: D000328:Adult; D015986:Confounding Factors, Epidemiologic; D019587:Dietary Supplements; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage* / Q000494:pharmacology; D006801:Humans; D016017:Odds Ratio; D011247:Pregnancy; D011272:Pregnancy, Multiple / Q000187:drug effects*; D027724:Reproductive Techniques, Assisted; D012107:Research Design; D013548:Sweden / Q000453:epidemiology; D014429:Twins, Dizygotic; D014798:Vital Statistics
chemical_list: D005492:Folic Acid