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Changes in the urinary system during pregnancy. The body goes through many changes during pregnancy. Significant anatomical changes occur in the urinary system. Under the influence of the hormone progesterone, the kidneys and the ureters dilate. This can lead to a slow down in the flow of urine through the ureters and therefore an increased risk of urinary infection in pregnancy.
The urinary system is comprised of the kidney, ureter, urinary bladder, and urethra. The kidney produces urine, which contains excess water, electrolytes and waste products of the body.It then flows down the ureter into the bladder where it is temporarily stored. The bladder is then emptied via the urethra.The kidney has several important homeostatic, hormonal, and metabolic functions that include:he kidney produces urine, which contains excess water, electrolytes and waste products of the body. It then flows down the ureter into the bladder where it is temporarily stored. The bladder is then emptied via the urethra. The kidney has several important homeostatic, hormonal, and metabolic functions that include: