A nurse is caring for a 26-year-old female client who is at 26 weeks of gestation in the antepartum unit. Exhibits Complete the diagram by dragging from the choices below to specify what condition the client is most likely experiencing, 2 actions the nurse should take to address that condition, and 2 parameters the nurse should monitor to assess the client’s progress.

Rationale for Correct Condition Preterm labor is defined as the onset of regular contractions leading to cervical change before 37 weeks of gestation. This client’s symptoms, including uterine contractions every 4–5 minutes, cervical effacement of 50%, a positive fetal fibronectin test, and shortened cervical length, strongly indicate preterm labor rather than pyelonephritis, placental abruption, or cervical insufficiency. Rationale for Correct Actions Magnesium sulfate functions as a tocolytic, suppressing contractions by inhibiting calcium influx in myometrial cells, thereby delaying preterm birth and reducing neonatal complications. Betamethasone accelerates fetal lung maturity by increasing surfactant production, reducing the risk of neonatal respiratory distress syndrome if preterm delivery occurs. Rationale for Correct Parameters Cervical effacement is a direct indicator of labor progression, showing changes in cervical thinning that accompany dilation. Monitoring effacement allows assessment of tocolytic effectiveness. Contraction frequency reveals labor severity and the response to magnesium sulfate. Persistent contractions despite treatment indicate the need for additional interventions. Rationale for Incorrect Conditions Pyelonephritis causes systemic symptoms like fever, flank pain, and bacteremia rather than uterine contractions and cervical changes. Placental abruption typically presents with painful vaginal bleeding and uterine tenderness, which are absent here. Cervical insufficiency is painless and lacks regular contractions, with cervical changes occurring silently rather than progressively. Rationale for Incorrect Actions Urine culture identifies infection but does not directly treat preterm labor. RhoGAM is necessary for Rh-negative individuals, which is irrelevant in this case. IV hydration may help with contractions but is not a primary intervention. Rationale for Incorrect Parameters Flank pain suggests pyelonephritis rather than preterm labor. Vaginal bleeding is associated with abruption or miscarriage, not preterm labor without cervical rupture. Fetal heart rate variability is useful in fetal assessment but does not directly indicate labor progression.