Gestaional thrombocytopenia accounts for approximately 70 of cases present at the time of delivery.Other causes of thrombocytopenia often follow a viral infection and usually resolve spontaneously…..choronic cases of idiopathic thrombocytopenia purpuraitp are most common in young women and occur in about 7-8 of pregnancies.the initial diagnomen of itp sometimes is made during pregnancy when a routine CBC reveals a decreased platelet count . it unclear what impact pregnancy can have on chronic itp.