The nurse is measuring the fundal height of a patient who is at 34 weeks of gestation. What fundal height measurement is expected for a patient who is at 34 weeks of gestation?

Correct Answer: C

Rationale: The correct answer is C (37 cm) because at 34 weeks of gestation, the fundal height measurement should be approximately equal to the number of weeks of gestation in centimeters. This is known as the "fundal height equals gestational age" rule. Therefore, at 34 weeks, the expected fundal height measurement should be around 34 cm. Option C (37 cm) is the closest to this expected measurement. Options A, B, and D are incorrect as they do not align with the fundal height expected at 34 weeks of gestation. Option A (31 cm) is too low, Option B (33 cm) is also lower than expected, and Option D (38 cm) is too high for 34 weeks of gestation.

Correct Answer: A

Rationale: The correct answer is A: annual income. This data is crucial for assessing the family's financial resources and potential impact on the patient's health and well-being during pregnancy. Annual income can help identify possible financial stressors that may affect access to healthcare, nutrition, and overall prenatal care. B: Total number of cousins is not typically part of a family assessment during pregnancy and does not directly impact the patient's prenatal care. C: Number of people living in the household is important for understanding the household dynamics, but it may not be directly related to the patient's prenatal care needs. D: Identifying the person in the household who makes major decisions is important for understanding family dynamics, but it may not directly impact the patient's prenatal care.

Correct Answer: B

Rationale: The correct answer is B: Multiple-marker screening. This analysis measures levels of certain proteins and hormones in maternal serum to assess the risk of chromosomal abnormalities in the fetus. It is considered the best predictor because abnormal levels of these markers can indicate conditions like Down syndrome. Biophysical profile (A) assesses fetal well-being but does not directly predict chromosomal abnormalities. Lecithin-to-sphingomyelin ratio (C) is used to assess fetal lung maturity, not chromosomal abnormalities. Blood type and crossmatch (D) are important for identifying Rh incompatibility but do not predict chromosomal abnormalities.

Correct Answer: A

Rationale: The correct answer is A: First trimester. During the first trimester, gestational age can be accurately determined through ultrasound by measuring the crown-rump length of the fetus. This measurement is most accurate during this time as the fetus is small and growth is consistent. In the second and third trimesters, other factors such as fetal growth variations and positioning can affect the accuracy of gestational age determination. Therefore, the first trimester is the most accurate time for determining gestational age through ultrasound. Other choices are incorrect because the precision of ultrasound measurements decreases as pregnancy progresses, making the first trimester the optimal window for accurate gestational age assessment.

Correct Answer: C

Rationale: The correct answer is C: 10 weeks. CVS is typically performed between 10-12 weeks of gestation. At this time, there is enough fetal tissue for sampling without significant risk to the pregnancy. Performing CVS earlier (options A, B) may result in insufficient tissue for accurate testing, while performing it later (option D) may increase the risk of procedure-related complications. Option C provides the optimal balance between ensuring accurate results and minimizing potential risks to the pregnancy.