The nurse is teaching a prenatal class for mothers with a past history of drug abuse.Which factor would the nurse need to emphasize about the first trimester of pregnancy?

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The nurse would need to emphasize that teratogenic agents taken during the first trimester can lead to structural malformations and spontaneous abortion. This is because the first trimester is when organogenesis takes place and the fetus is most vulnerable to teratogens. Mothers with a history of drug abuse may have a higher risk of exposure to teratogenic agents, so it is important for the nurse to emphasize this point.

The Nurse Is Teaching a Prenatal Class for Mothers with a Past