During pregnancy, as a result of the active production of the hormone progesterone, there may be some problems with the excretion of fluid. Progesterone is responsible for the active saturation of tissues and organs with moisture. In connection with the restructuring of the body, abundant fluid intake can be observed - up to 2.5 liters of fluid per day, which is not a pathology.
If less than 70% of the volume of liquid drunk per day is excreted in the urine, we can talk about possible problems. A change in diuresis can be observed both in a volume ratio and in an hourly ratio - at night a pregnant woman goes to the toilet more often than during the day.
The deviation of diuresis from the norm is expressed in the following terms:
• polyuria (the amount of excreted urine exceeds 2.5 liters);
• oliguria (diuresis less than 0.5 liters);
• anuria (complete absence of urine, or slight discharge of less than 50 ml in 24 hours);
• nocturia (night diuresis is 2/3 or more of the daily urine output).
The cause of abnormal diuresis may be:
• late toxicosis, in which all the moisture consumed is excreted with vomit, which threatens with dehydration;
• renal pathology (pyelonephritis, glomerulonephritis, ischemic nephropathy, etc.);
• diseases of the endocrine system (diabetes mellitus, disorders of the thyroid gland);
• arterial hypertension;
• thrombosis of renal vessels;
• hemolytic disease;
• intoxication with heavy metals.
In case of dehydration or suspected renal pathology, an additional analysis is prescribed for protein in the urine. Proteinuria (protein excretion in urine) can be both physiological and pathological. In the second case, the patient must be prescribed treatment.