There is no clear rule on how many weeks a pregnant woman can control her sugar, it may take about 2 weeks or even longer, the specific control time needs to be judged according to the blood sugar level. During pregnancy, blood glucose control should be stricter than normal, fasting blood glucose needs to be less than 5.1mmol/L, and 2-hour postprandial blood glucose needs to be less than 8.5mmol/L. If the blood glucose is higher than the standard value during pregnancy, then dietary glycemic control is needed, and insulin treatment is needed if necessary. If blood glucose is consistently high, it needs to be controlled all the time; if blood glucose control is stable, it does not need to be controlled all the time. In the 24-28 weeks of pregnancy, due to the higher risk of gestational diabetes, you need to go to the hospital for glucose tolerance screening, and if there is an abnormality, you should also actively control sugar. During pregnancy, you should have regular medical checkups and eat properly under the guidance of your doctor. During pregnancy, pay attention to rest, and at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.