title: Methotrexate during the first trimester of pregnancy.
mesh_terms: D000014:Abnormalities, Drug-Induced / Q000209:etiology*; D004305:Dose-Response Relationship, Drug; D005260:Female; D005493:Folic Acid Antagonists / Q000009:adverse effects*; D006801:Humans; D008727:Methotrexate / Q000009:adverse effects*; D011247:Pregnancy
chemical_list: D005493:Folic Acid Antagonists; D008727:Methotrexate