In fact, whether pregnant women or other ordinary people, it is best not to hold urine, because holding urine is damaging to the urinary system. According to human anatomy, the bladder is under the front of the uterus, and the uterus gradually increases in size as the fetus grows day by day, thus having a compressive effect on the bladder, and the symptoms of frequent urination can occur during pregnancy. Pregnant women should urinate often during pregnancy and should not hold their urine often. The reason for this is because as the number of days of pregnancy increases, the pressure of the uterus on the bladder, pregnant women will repeatedly have bowel movements, pregnant women should try to keep the bladder in a state of emptiness, on the contrary, if you hold urine for a long time, the bladder will also have a certain squeeze on the uterus, which may induce contractions, which is not conducive to the growth and development of the fetus, so pregnant women still should not often hold urine. At the same time, holding urine can cause urinary tract infections, mainly because urine can flush away most of the bacteria, while the mucous membrane of the urinary tract also has the ability to sterilize, if long-term holding urine can not flush away the bacteria, a large number of bacteria gathered in the urinary tract, it may cause urinary tract infections. During pregnancy, you should relax and maintain a good mental state, which can not only control the anxiety of pregnant women, but also promote the conception of the baby, so pregnant women should not hold urine to prevent causing mental tension, and at the same time to supplement vitamins and a variety of nutrients to promote the healthy development of the fetus.