Normal prenatal development occurs in 95 to 98 percent of all pregnancies. Identify two genetic or chromosomal abnormalities and two teratogens associated with birth defects in the remaining 2 to 5 percent of pregnancies. Describe the nature of their effects on development.

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The Answer of Normal prenatal development occurs in 95 to 98 percent of all pregnancies. Identify two genetic or chromosomal abnormalities and two teratogens associated with birth defects in the remaining 2 to 5 percent of pregnancies. Describe the nature of their effects on development.

Normal Prenatal Development Occurs in 95 to 98 Percent of All