A nurse is caring for a client who is in active labor.
The nurse notes late decelerations in the fetal heart rate on the monitor tracing. Which of the following actions should the nurse take first?

Choice A rationale

A speculum exam to test for fetal fibronectin is primarily used to predict the risk of preterm labor in symptomatic women between 22 and 34 weeks of gestation. Since the client is at 37 weeks of gestation (term) and the concern is a slow trickle of fluid suggesting rupture of membranes (ROM), this test is not appropriate for the current clinical presentation or gestational age.

Choice B rationale

Nitrazine testing is a rapid, non-invasive method used to determine if the fluid leaking from the vagina is amniotic fluid. Amniotic fluid is alkaline (pH of 7.0 to 7.5) and will turn the yellow-to-orange nitrazine paper to a characteristic deep blue color, which helps confirm the diagnosis of premature rupture of membranes (PROM), a likely cause of the reported fluid trickle.

Choice C rationale

A urinalysis determines components like protein, glucose, and ketones, and is mainly used to screen for conditions such as preeclampsia (indicated by proteinuria) or urinary tract infection (UTI). While part of routine prenatal care, it is not the diagnostic test for confirming ruptured membranes, which is the primary concern given the client's report of a slow trickle of vaginal fluid.

Choice D rationale

Amniocentesis is an invasive procedure used to aspirate amniotic fluid, typically to assess fetal lung maturity (L/S ratio) or for genetic testing. Since the client is at 37 weeks and the suspicion is ruptured membranes, which warrants immediate action due to infection risk, the risks and benefits of an amniocentesis for lung maturity are not justified.

Choice A rationale: Uterine contractions occurring every 2 to 3 minutes at 30 weeks gestation are abnormal and indicate preterm labor. Normal uterine activity in the third trimester should not demonstrate such frequency or cervical change until term. The presence of cervical dilation (2 cm) and effacement (80%) confirms labor physiology. Preterm labor poses risks of neonatal respiratory distress, intraventricular hemorrhage, and sepsis. Therefore, this finding requires immediate follow-up to prevent complications associated with premature birth.

Choice B rationale: Abdominal assessment revealed a soft, nontender abdomen with no rebound tenderness. These findings are within normal limits and do not suggest acute abdominal pathology such as placental abruption, appendicitis, or peritonitis. In obstetrics, concerning abdominal findings would include rigidity, tenderness, or guarding. The absence of these signs indicates no emergent intra-abdominal complication. Thus, this assessment does not require follow-up, as it reflects a physiologically normal abdominal exam for a pregnant client.

Choice C rationale: Fundal height at 30 weeks gestation is expected to measure approximately 28 to 32 cm, correlating with gestational age ±2 cm. This client’s fundal height of 28 cm falls within the normal range. Deviations greater than 3 cm could indicate intrauterine growth restriction, oligohydramnios, or macrosomia. Since the measurement is consistent with gestational norms, it does not require follow-up. This finding is physiologically appropriate and does not suggest pathology or abnormal fetal growth at this stage of pregnancy.

Choice D rationale: Abdominal cramping in the third trimester, when associated with cervical dilation and effacement, is a hallmark of preterm labor. Unlike benign Braxton Hicks contractions, which are irregular and non-progressive, these cramps are accompanied by cervical change and regular contractions. This indicates true labor physiology before 37 weeks. Preterm labor increases risks of neonatal morbidity and mortality. Therefore, abdominal cramping in this context requires follow-up to initiate interventions such as tocolysis, corticosteroids, and infection evaluation.

Choice E rationale: Low back pain in pregnancy can be benign due to musculoskeletal strain, but in this case, it is associated with uterine contractions, cervical change, and rupture of membranes. Low back pain is a common presenting symptom of preterm labor due to referred pain from uterine activity. Additionally, fever (38.3°C) and elevated WBC count (22,000/mm³; normal 5,000–10,000/mm³) raise concern for intra-amniotic infection. Thus, low back pain here is pathologic and requires follow-up to rule out chorioamnionitis and manage preterm labor.