Pregnancy should be considered a std. You can only contract pregnancy from having sex, there is no other way to pass the disease to the host. A disease is a disorder of structure or function in a human, animal, or plant, especially one that produces specific signs or symptoms or that affects a specific location and is not simply a direct result of physical injury. Pregnancy disrupts most function in the body. When women become pregnant alot of the times they are sensitive to smells, they become more emotional, they eat funny foods. These could be categorized as symptoms of a pregnancy. Other symptoms could include swollen feet, enlarged stomach and breasts, and eating funny foods. None of this is a direct result physical injury. This is why pregnancy should be considered a std. By definition it is a disease. One that can only be contracted sexually. Please tell me why this isn't classified as a sexually transmitted disease.