This retrospective study of 138 patients with HELLP syndrome found that treatment with intravenous methylprednisolone (MP) prolonged pregnancy by a median of 4 days and significantly improved maternal platelet counts and liver enzyme levels compared to immediate delivery. Neonates in the MP group had a 65% lower relative risk of requiring invasive ventilation and lower infant mortality (1.6% vs 8.6%), suggesting that corticosteroid therapy may improve both maternal and neonatal outcomes in selected patients with HELLP syndrome.