title: Is the low-dose pill always preferable?
mesh_terms: D003276:Contraceptives, Oral / Q000008:administration & dosage*; D004967:Estrogens / Q000008:administration & dosage; D005260:Female; D006801:Humans; D011247:Pregnancy
chemical_list: D003276:Contraceptives, Oral; D004967:Estrogens