A placement of ureteral stents in pregnant women is a routine endoscopic procedure, which is widely used in case of obstructive uropathy, urolithiasis and hydronephrosis. At the same time, it should be remembered that there is a risk of accelerated calcification (stone formation) of stents due to gestational features of calcium metabolism, changes in the biochemical composition of urine. It can lead to obstructive, infectious and obstetric complications. Therefore, it is important to establish strict indications for upper urinary tract drainage during pregnancy and to determine the correct method for successful treatment and prevention of complications. Careful follow-up of women with ureteral stents and their timely removal or replacing are mandatory. A clinical observation of a woman with urolithiasis and the need to perform multiple urological procedure during two consecutive pregnancies is presented in the article.

Keywords: stent-associated symptoms, percutaneous puncture nephrostomy, acute obstructive pyelonephritis, ureteral stent, pregnancy, urolithiasis, obstructive uropathy, Canephron n