Is Betnesol injection safe during pregnancy?

Betnesol (betamethasone) is a steroid injection given when preterm birth is expected. It crosses to the baby and speeds up lung maturity, which substantially reduces the risk of breathing difficulties after birth. It also lowers the risk of bleeding in the brain and of a serious bowel condition in premature babies. It is given as a short course of injections into the muscle, usually two doses 24 hours apart. The benefit is greatest when birth happens between about 24 hours and 7 days after the first dose. It is most established for births expected before 34 weeks. It may also be offered in the late preterm window — 34 to just under 37 weeks — for selected patients at risk of imminent delivery who have not already had a course. Whether it applies to you depends on your gestation, why preterm birth is anticipated, and whether you have had steroids before. It is well studied and considered safe in this setting. Short-term effects can include a temporary rise in blood sugar, which matters if you have diabetes and may mean closer monitoring for a few days. Your obstetrician is deciding this against your specific situation — do ask them why it is being offered and what they expect it to achieve.