title: Maternal serum-copper concentration and neural-tube defects.
mesh_terms: D000757:Anencephaly / Q000209:etiology*; D003300:Copper / Q000097:blood*; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy / Q000097:blood*; D014852:Wales
chemical_list: D003300:Copper