Which statement correctly describes the dosing for betamethasone to promote fetal lung maturity in preterm labor?

Which statement correctly describes the dosing for betamethasone to promote fetal lung maturity in preterm labor?

• A. Betamethasone given intramuscularly in two doses 24 hours apart.
• B. Dexamethasone given orally in a single dose.
• C. Betamethasone intravenous infusion daily for three days.
• D. Hydrocortisone topical.

Answer: (A)

The key idea is the standard antenatal corticosteroid regimen that helps the fetus mature its lungs when preterm birth is likely. Betamethasone is given as two intramuscular doses, 12 mg each, spaced 24 hours apart, for a total of 24 mg within about 48 hours. This schedule has the strongest evidence for increasing fetal surfactant production and reducing neonatal respiratory distress syndrome, especially when birth may occur within the next week and before 34 weeks' gestation. Other dosing options aren’t supported as the preferred regimen: an oral single dose of a different steroid doesn’t provide the same fetal lung benefits, a daily intravenous infusion for several days isn’t the proven betamethasone schedule, and hydrocortisone topical has no role in promoting fetal lung maturity.

The key idea is the standard antenatal corticosteroid regimen that helps the fetus mature its lungs when preterm birth is likely. Betamethasone is given as two intramuscular doses, 12 mg each, spaced 24 hours apart, for a total of 24 mg within about 48 hours. This schedule has the strongest evidence for increasing fetal surfactant production and reducing neonatal respiratory distress syndrome, especially when birth may occur within the next week and before 34 weeks' gestation.

Other dosing options aren’t supported as the preferred regimen: an oral single dose of a different steroid doesn’t provide the same fetal lung benefits, a daily intravenous infusion for several days isn’t the proven betamethasone schedule, and hydrocortisone topical has no role in promoting fetal lung maturity.