NCLEX RN Predictor Exam Related

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A urine pregnancy test:

  • A. May be negative even if a blood pregnancy test is positive.
  • B. Is positive only during the first trimester of pregnancy.
  • C. Will be negative if the amount of LH isn't enough to meet or exceed the sensitivity of the testing device.
  • D. All of the above.
Correct Answer: A

Rationale: A urine pregnancy test detects HCG in a pregnant woman's urine. Blood levels of HCG are usually higher and register earlier than HCG levels in the urine. Choice A is correct because urine pregnancy tests may be negative even if a blood pregnancy test is positive due to the differences in HCG levels in blood and urine. Choice B is incorrect because a urine pregnancy test can be positive throughout pregnancy, not just in the first trimester. Choice C is incorrect because LH (luteinizing hormone) is not the hormone detected in a pregnancy test; it is HCG (human chorionic gonadotropin). Choice D is incorrect because not all the statements provided are true.