Maternal glucose tolerance 2 hours higher than 1 hour may be related to slow glucose metabolism, delayed insulin secretion, insulin resistance and other reasons. 1. Slow glucose metabolism: normal maternal glucose tolerance 2 hours is lower than 1 hour, and the occurrence of maternal glucose tolerance 2 hours is higher than 1 hour may be caused by slow glucose metabolism. 2. Delayed insulin secretion: Pregnant women with glucose tolerance 2 hours higher than 1 hour may consider delayed insulin secretion, insulin secretion can not be synchronized with the postprandial blood glucose elevation. 3. Insulin resistance: Pregnant women with glucose tolerance 2 hours higher than 1 hour can also be considered to be caused by insulin resistance, which will lead to abnormal glucose tolerance. Pregnant women with glucose tolerance 2 hours higher than 1 hour should be considered to suffer from high blood sugar and other abnormalities, it is recommended to go to the hospital for a detailed blood glucose test.