Idiopathic thrombocytopenic purpura is a very rare disease, especially during pregnancy. It is characterised by low platelet count and predominantly muco-cutaneous bleeding. There are many forms to monitor and treat these patients. Here, we present a case of a pregnant woman, with idiopathic thrombocytopenic purpura, who was submitted to treatment only when the platelet count was below 10,000/μl, with human intravenous immunoglobulin. During the evolution of pregnancy, caesarean delivery and puerperium were favourable.