Substances that come in contact with the fetus through the mother and interfere with normal development are called

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Teratogens are substances that can cause birth defects or interfere with normal development in a fetus when they come into contact with the mother's body during pregnancy. Examples of teratogens include alcohol, certain prescription medications, and environmental toxins. Allergens are substances that cause an allergic reaction, carcinogens are substances that cause cancer, and estrogens are a type of hormone.

Substances That Come in Contact with the Fetus Through the Mother