title: Are vitamin A supplements needed during pregnancy?
authors.forename: E
authors.initials: E
authors.lastname: Lammer
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy / Q000378:metabolism*; D014801:Vitamin A / Q000008:administration & dosage* / Q000009:adverse effects / Q000378:metabolism
chemical_list: D014801:Vitamin A