The parents are questioning why their newborn was born deaf when there are no other deaf family members.
At which stage of the pregnancy could the nurse explore possible exposure to a teratogenic agent?
18 weeks after fertilization.
6 weeks after fertilization.
12 weeks after fertilization.
Incomplete question/stem.
The Correct Answer is B
“6 weeks after fertilization.” Teratogens can begin affecting the developing embryo as early as 10 to 14 days after conception 1.
During embryonic development, there are periods when the developing organ systems show more sensitivity to teratogens.
Choice A is incorrect because 18 weeks after fertilization is not the earliest stage of pregnancy when exposure to a teratogenic agent could occur.
Choice C is incorrect because 12 weeks after fertilization is not the earliest stage of pregnancy when exposure to a teratogenic agent could occur.
Choice D is incorrect because this is not an incomplete question/stem.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A child with autism spectrum disorder may have problems with social communication and interaction, including ignoring a caregiver who offers them a snack.
Choice A is incorrect because crying and stomping feet after another child takes a toy is normal behavior for a 2- or 3-year-old child.
Choice B is incorrect because repeating an action over and over is not necessarily indicative of autism spectrum disorder.
Choice D is incorrect because flipping a light switch off and on until asked to stop and join other children in playing is not necessarily indicative of autism spectrum disorder.
Correct Answer is B
Explanation
Blood volume increases significantly within the first few weeks of gestation and increases progressively throughout the pregnancy.
The total blood volume increase varies from 20% to 100% above prepregnancy levels, usually close to 45%1.
Choice A is incorrect because the increase is usually close to 45%, not 20% to 25%.
Choice C is incorrect because the increase is usually close to 45%, not 50% to 55%.
Choice D is incorrect because the increase is usually close to 45%, not 30% to 35%.
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