Methamphetamine are abused by many people today, although exact prevalence rates are not available. Some abusers are women of reproductive age who may become pregnant. However, little information exists on the effects of Methamphetamine abuse on the developing embryo or fetus. Limited information suggests that Methamphetamine use during pregnancy may be liked to congenital anomalies, although the data are not conclusive. If such a risk exists, abusers who are exposed to large doses of these substances should be an appropriate subgroup for examining the possible teratogenic effects of Methamphetamine. Such data are often complicated in that abusers use multiple substances and may suffer malnutrition secondary to addiction.