The nurse is providing genetic counseling for an expectant couple who already have a child with trisomy 18.The nurse should:

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Genetic testing,including amniocentesis,would need to be performed to determine whether the fetus is affected.The couple should be given information about the likelihood of having another baby with this disorder so that they can make an informed decision.A genetic counselor is the best source for determining genetic probability ratios.The couple eventually may need emotional support,but the status of the pregnancy must be determined first.

The Nurse Is Providing Genetic Counseling for an Expectant Couple