Correct Answer: B

Rationale: Tocolytic therapy is used to suppress premature labor. It is appropriate to administer it to a client experiencing preterm labor at 26 weeks of gestation to help delay delivery and improve neonatal outcomes. Administering tocolytic therapy to a client experiencing fetal death, Braxton-Hicks contractions, or post-term pregnancy is not indicated and may not be safe or effective in these situations. Fetal death at 32 weeks indicates a non-viable pregnancy, Braxton-Hicks contractions are normal and not indicative of preterm labor, and post-term pregnancy at 42 weeks does not require tocolytic therapy.

Correct Answer: D

Rationale: Variable decelerations can indicate umbilical cord compression, which is a concern that may arise due to the umbilical cord being compressed during labor. This compression can lead to reduced blood flow and oxygen delivery to the fetus, necessitating close monitoring and potentially interventions to alleviate the pressure on the cord. Early decelerations are typically benign and mirror the contractions, indicating fetal head compression. Accelerations are reassuring patterns that show a healthy response to fetal movement. Late decelerations are concerning as they suggest uteroplacental insufficiency, indicating potential oxygen deprivation to the fetus.

Correct Answer: C

Rationale: An L/S ratio of 2:1 indicates fetal lung maturity, as it signifies the presence of surfactant in the amniotic fluid, which helps with lung expansion and prevents collapse at the end of expiration. The absence of PG indicates immaturity of the fetal lungs, as PG appears in the amniotic fluid during the later stages of lung maturation. Biophysical profile scores and nonstress tests are assessments of fetal well-being and do not directly indicate fetal lung maturity. Therefore, choice C is the correct answer.

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: C

Rationale: The correct answer is C. When contractions are 4 minutes apart, it means there are 4 minutes from the start of one contraction to the start of the next. If each contraction lasts 60 seconds, there will be a 3-minute rest period between contractions. This allows for adequate uterine relaxation and recovery before the next contraction begins. Choice A is incorrect because it suggests a 4-minute rest between contractions, which is not accurate. Choice B is incorrect as contractions lasting 4 minutes continuously without rest would be concerning. Choice D is incorrect as it suggests 45-second contractions instead of 60-second contractions.