Most people are generally aware that smoking is not healthy, but instances of poor knowledge about the health risks abound. Relatively few women are aware of gender-specific health risks, including cervical cancer, osteoporosis, early menopause, miscarriage, ectopic pregnancy, and infertility. Fewer than half of Canadian adults aged 55 to 74 years identified smoking as a major cause of heart disease. Cigarettes cause disease in nearly every organ of the body.