· Increasing renal blood flow

· Tubular reabsorption does not change

· Increase glomerular filtration

· Increase in osmotic clearance to 500-700 ml / min

· Extra day filtered 100 liters of liquid

· Diuresis decreased by the end of pregnancy up to 1200 ml

 In early pregnancy urine output increases to 2 liters is observed up to 32 Week

· Increase filtration up to 40% (glomerular). In the third trimester, these indices returned to normal. Maximum load otmechaesyat to 32 weeks.

· Renal blood flow increased by 10%

· Creatinine level lower than in nonpregnant women

· Reduce uric acid

· If there is an increase of creatinine and uric acid, it says of gestosis

· Orthostatic proteinuria and glucosuria as the uterus compresses inferior vena cava, renal veins, increases vascular permeability

· Due to the influence of progesterone (relaxing effect) occurs lower tone ureters, pelvis, increases the capacity of the urinary tract: increases the volume of pelvis, ureter, urinary bladder. The conditions for infection. Normally, bacteria are not more than 0.1 million in 1 million,if more then is asymptomatic bacteriuria. It should be treated,because there is a danger pyo-septic infections in the postpartum period. Are identified pyelonephritis pregnant women (because there are conditions) or exacerbation of chronic nephritis (lactation). Vesicoureteral reflux was observed. May be frequent urge for urination.