Quit Smoking Immediately.If you have been smoking cigarettes or tobacco in any other form, then stopping it before pregnancy is the most ideal thing to do. Smoking raises the chances for miscarriage, untimely birth and low-birth-weight. Furthermore, it also expands the likelihood of your child developing issues later on, such as asthma.If you think that you can't stop, in that case, at least make an attempt to reduce the quantity of cigarettes you smoke, and take additional care to eat well. Your gynecologist can give you helpful tips on the most effective method to stop or decrease smoking cigarettes. Even if you're not a smoker, keep in mind that long exposure to second-hand smoke is likewise unsafe.