Urinary retention developing in early period of pregnancy is a rare but urgent condition. A few literatures were encountered on this issue. Retrovert uterus, endometriosis, pelvic inflammatory event-related adhesions, ectopic pregnancy and intramural myomas are among predisposing factors. These factors cause stucking of uterus in pelvic cavity by hindering elevation of uterus in the abdomen and acute urinary retention may develop as the result of pressure to urinary bladder floor and urethra The case who developed the urinary retention in her three sequential pregnancies has been discussed in the light of the literature in this paper.