Giving up smoking is one of the single most important things you can do for yourself and for the health of a future pregnancy. If you currently smoke, then it is wise to consider giving up, or at least cutting down, even if you don’t plan to have a baby right away. The American Medical Association estimates that smoking and passive smoking are responsible for a large percentage of miscarriages and impotence in men aged between 30 and 50 each year. Women who smoke are also more likely to have an ectopic pregnancy or miscarriage. Medical research has also shown beyond doubt that smoking affects the development of babies in the womb since they are starved of oxygen while they are growing. Smoking remains one of the few potentially preventable factors associated with low birth weight, premature birth, stillbirth, and Sudden Infant Death Syndrome (SIDS)