The nurse is administering medication to a pregnant patient. After looking up the medication, the nurse determines the medication is categorized as a Pregnancy Risk Category A. What is true of Pregnancy Risk Category A drugs?

The correct answer is D: Fetal harm is unlikely. Pregnancy Risk Category A drugs have been studied extensively in pregnant women and have not shown any evidence of risk to the fetus. The rationale is that these drugs have a low risk of causing harm to the fetus based on well-controlled studies in pregnant women. Choice A is incorrect because it implies that there may be a risk, which is not the case for Category A drugs. Choice B is incorrect as Category A drugs have not shown any fetal risk. Choice C is incorrect because drugs in Category A are considered safe for use in pregnant women.