Pharmaceutical manufacturers are required to warn doctors of the non-obvious hazards that the product may cause and inform physicians how to avoid these hazards. Doctors are required to inform their patients of the possible risks of IUDs. Additionally, doctors must ask if the patient has a copper allergy, Wilson’s disease, a bleeding disorder, is pregnant, has a sexually transmitted disease (STD) or pelvic infection, has had an abortion in the past three months, and if they have uterine cancer.