The nurse is assessing a newborn girl born at 40 weeks of gestation based on the parent's LMP. What assessment finding of the genitalia confirms this gestational age?
Correct Answer: A
Rationale: The correct answer is A because at 40 weeks of gestation, the labia majora should completely cover the clitoris and labia minora. This is known as the "laboratory majora sign" and is characteristic of full-term newborns.
Choice B is incorrect because a prominent clitoris and enlarged labia minora indicate a younger gestational age, typically around 36-38 weeks.
Choice C is incorrect as small labia minora and enlarged clitoris suggest a preterm newborn, around 32-34 weeks.
Choice D is incorrect as enlarged labia majora and small labia minora are more indicative of a post-term newborn, around 42 weeks or more.
Overall, the correct answer, choice A, aligns with the expected genitalia findings for a newborn born at 40 weeks of gestation based on the parent's LMP.