One way in determining your fitness level is trying to do a Full Sprint Run and holding your breath for as long as you can. That way you can determine your cardiovascular capacity and lung capacity. On improving your fitness levels you should do swimming, jogging and of course a balanced diet.
Smoking or drug addiction for an expecting mother is more dangerous because not only are the chemicals affecting her but they are affecting her baby as well if addiction continues through to the birth of the child the baby can experience withdrawal symptoms and can be underdeveloped
Heart disease, lung disease, gum disease, throat cancer, halitosis