title: Oral contraceptives and subarachnoid haemorrhage.
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D003280:Contraceptives, Oral, Synthetic / Q000009:adverse effects*; D005260:Female; D006801:Humans; D013345:Subarachnoid Hemorrhage / Q000139:chemically induced* / Q000276:immunology
chemical_list: D003276:Contraceptives, Oral; D003280:Contraceptives, Oral, Synthetic