BackgroundPregnancy-related carpal tunnel syndrome (PRCTS) is the most common mononeuropathy during pregnancy.Objectiveto compare the efficacy of ultrasound (US)-guided steroid injection alone versus wiht splinting on symptom severity on PRCTS.MethodsThis retrospective cohort study included 37 pregnant women in their third trimester with PRCTS, treated with ultrasound-guided steroid injection of 4 mg dexamethasone into the median nerve (Group I, n = 15), volar splinting in a neutral position while sleeping and during the day whenever possible for at least ten weeks (Group S, n = 12), or both injection and splinting (Group I + S, n = 10). Patient data were collected from hospital records, and symptoms were assessed using the Boston Carpal Tunnel Symptom Questionnaire (BCTQ), the Douleur Neuropathique 4 (DN4) and the Numeric Rating Scale (NRS). Statistical analyses included Student's t-test, Mann-Whitney U test, Fisher's exact test, ANOVA, Kruskal-Wallis test, descriptive analyses, and power analyses.ResultsDuring the first month of intervention, group S had higher BCTQ scores than the other two groups