It is true that pregnant women with a family history of diabetes are more likely to develop gestational diabetes. In general, an OGTT is ordered between 24 and 28 weeks of pregnancy. However, for mothers with high-risk factors, it is recommended that an OGTT be performed directly at the first maternity visit for a definitive diagnosis. In addition, it is important to pay extra attention to whether you are drinking more, eating more, urinating more, losing weight or gaining weight at a particularly slow rate. It is best to monitor your blood glucose at home if you have the conditions to do so, and contact your doctor as soon as you find high blood glucose. It is also important to maintain a healthy diet, balanced nutrition and regular exercise.