Correct Answer: A

Rationale: Rubella immunization is recommended shortly after giving birth for a pregnant individual who lacks immunity. This timing ensures the client is protected from rubella in future pregnancies. Administering the vaccine postpartum allows the body to develop immunity without posing any risk to the developing fetus during pregnancy. Option B is incorrect because administering the rubella vaccine in the third trimester can potentially expose the developing fetus to the live virus, which is not recommended. Option C is incorrect as there is a preferred timing for rubella immunization in this scenario. Option D is incorrect as waiting until the next attempt to get pregnant does not protect the current pregnancy from rubella exposure.

Correct Answer: B

Rationale: Methylergonovine is used to prevent or treat postpartum hemorrhage by contracting the uterus. A firm fundus indicates effective uterine contraction and less bleeding. Therefore, the correct answer is a firm fundus to palpation. The increase in blood pressure (Choice A) is not a typical finding associated with the effectiveness of methylergonovine. Increase in lochia (Choice C) may indicate excessive bleeding rather than the medication's effectiveness. Absence of breast pain (Choice D) is not directly related to the medication's effectiveness in treating postpartum hemorrhage.

Correct Answer: D

Rationale: Obtaining a 30-minute electronic fetal monitoring (EFM) strip prior to epidural analgesia is crucial to establish a baseline for fetal heart rate and uterine activity. This baseline helps in monitoring fetal well-being during labor and assessing the effect of analgesia on the baby. It enables the healthcare team to identify any changes in the fetal heart rate pattern and uterine contractions, ensuring the safety of both the mother and the baby. Choices A, B, and C are incorrect because having the client sit upright with legs crossed is not necessary for epidural placement, administering a bolus of lactated Ringer's solution is not typically done before epidural analgesia, and the duration of the anesthetic effect varies and is not accurately 2 hours.

Correct Answer: B

Rationale: When measuring a newborn's chest circumference, the appropriate anatomical landmark to use is the nipple line. This point is consistent and allows for accurate and standardized measurements across all newborn assessments. The sternal notch is not typically used for chest circumference measurements in newborns. The xiphoid process is located at the lower end of the sternum and is not an appropriate landmark for chest circumference measurement. The fifth intercostal space is typically used for locating the point of maximal impulse (PMI) during cardiac assessments, not for measuring chest circumference.

Correct Answer: B

Rationale: The described pattern suggests late decelerations, indicating uteroplacental insufficiency. Discontinuing the oxytocin infusion helps reduce uterine contractions, improving placental blood flow and fetal oxygenation. This intervention is essential to prevent fetal compromise and potential harm during labor. Choice A is incorrect because decreasing the rate of the maintenance IV solution does not directly address the cause of the late decelerations. Choice C is incorrect because increasing the rate of IV oxytocin can worsen uterine contractions, exacerbating the fetal distress. Choice D is incorrect because slowing the client's breathing rate is not indicated in the management of late decelerations during labor.