According to Mosby: ?A teratogen is any substance that interferes with normal antepartum development, causing the formation of one or more developmental abnormalities in the fetus? (Stratton. K,Battaglia. F, 1996). Teratogens are any substances that the habitationnta can non place out. The placenta is the mass of tissue that is filled with neckcloth and that nourishes the fetus. These substances equal the fetus directly because the mother?s and the child?s blood st...If you want to get a full essay, assemble it on our website: OrderEssay.net
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