A nurse is assisting with providing care for a client who is in preterm labor at 32 weeks of gestation. Which of the following medications should the nurse anticipate the provider will prescribe to help with lung maturity?

Choice A rationale Betamethasone is a corticosteroid medication administered intramuscularly to the mother to stimulate the production and release of pulmonary surfactant in the preterm fetal lungs. Surfactant, composed of lipoproteins, decreases surface tension in the alveoli, preventing their collapse and reducing the risk and severity of Respiratory Distress Syndrome (RDS) in newborns delivered between 24 and 34 weeks of gestation. Choice B rationale Magnesium Sulfate is a central nervous system depressant primarily used as a tocolytic to relax the smooth muscle of the uterus, thereby suppressing preterm labor contractions. Furthermore, it offers neuroprotection for the preterm fetus by stabilizing neuronal membranes, reducing the risk of cerebral palsy and other gross motor dysfunction, but it does not directly promote lung maturity. Choice C rationale Azithromycin is a macrolide antibiotic used to treat various bacterial infections, often prescribed in preterm labor if an intra-amniotic infection (chorioamnionitis) or other maternal infection is suspected or confirmed. Its role is antimicrobial, not tocolytic or for fetal lung maturation. Infection can often precipitate preterm labor, thus treating it may stabilize the pregnancy. Choice D rationale Indomethacin is a nonsteroidal anti-inflammatory drug (NSAID) and is used as a tocolytic agent, primarily by inhibiting prostaglandin synthesis, which is essential for initiating labor contractions. Its main purpose is to postpone delivery in preterm labor; however, its use is generally restricted to gestations before 32 weeks due to potential risks like premature closure of the fetal ductus arteriosus. .