Teratology is the study of exogenous chemical compounds (teratogens) that have the capacity to cause drastic damage to developing embryos. Teratogens include certain chemicals, medications, social drugs, alcohol, smoking, and infections, which a woman should avoid during pregnancy. Complete the information required in the tables below: Table 2: Alcohol, smoking and psychoactive drugs Teratogen Effect Images Alcohol     Tobacco smoke     Marijuana     Amphetamines     Heroin or methadone     Cocaine

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