When a woman develops high blood sugar levels 1st time during her pregnancy (usually during 2nd or 3rd trimester) is known as Gestational Diabetes. It is normally disappears after delivery but may remain persistent in around 2-4% women. women with history of gestational diabetes have higher chances of getting type 2 diabetes in future. Some women may have Type 2 diabetes before pregnancy & amp; they conceive. In such women high blood sugar levels will remain persistent even after delivery.