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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.
Typically, pregnant women do not have unusual or unique symptoms. If a woman is pregnant, her urine should be checked during prenatal visits because an unrecognized infection can cause pregnancy complications. Although most people have symptoms with a urinary tract infection, some do not. The symptoms of urinary tract infection can resemble those of sexually transmitted diseases.