When a pregnant woman reaches the late stage of pregnancy, due to the pressure of the enlarged fetus on the bladder of the pregnant woman, frequent urination will occur, and it is normal to go to the toilet once an hour at night. After pregnancy, as the fetus continues to grow, the uterus also continues to increase in size, will produce pressure on the bladder. In addition, due to the increase in circulating blood volume in late pregnancy, pregnant women are also prone to increase the volume of urine, the combined effect of the two led to the emergence of frequent urination, especially at night, may be more obvious, and even appeared to go to the toilet once an hour. If a pregnant woman does not have urinary pain and other manifestations during urination, and the urine routine test is normal, it does not require special treatment, but if there is urinary pain or abnormal urine routine and other symptoms, it is recommended to consult a doctor in a timely manner, with the help of a doctor to clarify the cause of the disease, and targeted treatment or therapy.