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What causes Hydronephrosis during pregnancy

What causes Hydronephrosis during pregnancy


It is a type of chronic diseases that occurs in one kidney at the time of pregnancy. Swelling occurs in either one of the kidneys due to the drainage of urine from the kidney to the urinary bladder. This condition may cause due to the variations in the hormonal levels.

If the swelling occurs on one kidney, it may cause unilateral Hydronephrosis. If both the kidneys were affected at the same time, it is called bilateral Hydronephrosis. This condition occurs due to the presence of the fetus within the womb, which is called maternal hydronephrosis.

Symptoms of Hydronephrois

The pressure in the urinary track increases if there is an obstruction in the urinary tract. This pressure results in the enlargement of kidney and starts pressing to nearby organs. The mild and first symptom of hydronephrosis is the increment in the urinary frequency and increment in the urge to urinate. Severe symptoms of hydronephrosis are:

  • Abdominal pain
  • Nausea/vomiting
  • Pain at the time of urination
  • Fever
  • Urinary tract infection

Causes of Hydronephrosis

This condition is not treated as a disease and this is mainly caused due to the internal and external condition that affects kidney and the urinary regarding system. The main cause for this condition is the development of an obstruction in one of the uterus. Kidney stone is the culprit for this condition and causes urinary to pass back into the kidney, results in swelling. This process of urine backflow is called vesicoureteric reflux. Other causes may include: ureteropelvic junction, hormonal changes during pregnancy like progesterone. As the uterus increases its weight during pregnancy, the space cause dilation results in hydronephrosis.

Diagnosis of hydronephrosis

  • Ultrasound
  • Urine test to determine any infections
  • Anemia checkup

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