The best time to stop drinking alcoholic beverages is before you become pregnant. If you are pregnant and are still drinking, the time to stop is now. If you need help, ask your doctor. Mothers who smoke are more likely to have small babies. These babies are more likely to have problems during labor and delivery and to develop health problems in early infancy.
Smoking also increases the risk of miscarriage and premature labor.
If you are a smoker, stop now, especially before the second half of your pregnancy. Coffee, tea, chocolate, some cola drinks, and some medications contain caffeine. Animal experiments have shown that high doses of caffeine may cause birth defects in rats. There are no proven cases in humans. It s probably best to reduce the amount of caffeine you consume to low levels during pregnancy.