High-dose intravenous immunoglobulin (HD-IVIG) has temporary but reliable efficacy in idiopathic thrombocytopenic purpura (ITP). HD-IVIG has been described as the representative management in pregnant cases of refractory to corticosteroid or immunosuppressants. There have been few cases treated with repeated HD-IVIG to sustain pregnancy from the early phase of pregnancy. This case report describes a pregnant case of steroid-refractory ITP, treated with six times repeated HD-IVIG, resulting in the successful delivery of a healthy newborn with a normal platelet count. No adverse effects were observed.