Pregnancy combined with kidney stones and ureteral stones is not uncommon for three main reasons: 1, anatomical factors: the rightward tilt of the uterus during pregnancy will compress the right ureter, resulting in slow urinary flow in the right upper urinary tract, and some crystalline substances in the urine may precipitate; 2, humoral factors: after pregnancy, the level of progesterone is obviously upregulated, which will lead to slow peristalsis of the ureter; 3, dietary factors: after pregnancy, all will supplement calcium (such as drinking milk), or even taking calcium tablets, resulting in elevated blood calcium and increased calcium excretion in the urine, forming stones. Generally, stones formed during pregnancy are not too large and are mainly treated conservatively, such as: 1) drinking more water, 2) appropriate activities, 3) symptomatic treatment of pain, 4) oral lithotripsy medication, etc. Stones can often be expelled. If the pain persists, a double J tube can be left in place to drain the fluid, and the pain can often be relieved after the pressure in the renal pelvis is reduced. If the stone obstruction causes high fever, emergency treatment is needed, or even nephrostomy is needed to drain the pus in the kidney and wait for the fetus to be delivered before dealing with the stone.