Abstract: Objective：To evaluate the efficacy and safety of the double-J ureteral stents in those pregnant women with ureteral calculi. Methods：The clinical data of 27 pregnant women with ureteral calculi who underwent operation of placing double-J ureteral stents by cystoscope in the 11th Hospital of PLA from June 2009 to December 2013 were retrospectively analyzed. The curative effect and adverse effects were recorded. Results：Of all the 27 cases, surgery was successful without severe complications; renal colic was relieved by placing double-J ureteral stents under cystoscope. All of them successfully had full-term birth. After delivery, the stones were spontaneously eliminated in 7 cases, and removed by ureteroscopic lithotomy in other 20 cases. There were not severe adverse events within 6 to 60 months′ follow-up visiting in all patients. Conclusions：Placing double-J ureteral stents under cystoscope is safe and efficient for those pregnant women with ureteral calculi, if the conservative treatment to eliminate renal colic was unsuccessful.

Key words: Pregnancy, Ureteral calculi, Pregnancy complications, Catheters, indwelling, Double-J ureteral stents