The fifth month of pregnancy is the middle of pregnancy, and at this stage the uterus will be significantly enlarged and has grown out of the pelvic cavity. Therefore, the frequency of urination due to uterine pressure is normally said to be no longer present. At this stage, if a pregnant mother experiences frequent urination, the main causes to consider are polyuric frequency, inflammatory frequency and neurogenic frequency. Polydipsia is most common in cases of gestational diabetes when the frequency of urination is accompanied by a significant amount of urine at a time and the total volume of urine throughout the day increases significantly. In addition, inflammatory polyuria, along with frequent urination, is accompanied by urinary urgency and painful urination. A urinalysis can see a large number of inflammatory cells and is commonly associated with cystitis and urethritis. Neurogenic dysuria is a condition in which frequent urination is accompanied by a small volume of urine at a time, without urgency, painful urination and an increase in inflammatory cells on urinalysis. Pregnant mothers must go to the hospital after having frequent urination to clarify the cause of frequent urination and treat the cause to ensure the health of the mother and baby.