What causes increased urinary frequency during pregnancy?

• A. The uterus puts pressure on the bladder
• B. Increased urine production
• C. Kidney enlargement causes more urination
• D. Dehydration

Answer: (A)

Growing uterus presses on the bladder, reducing its storage capacity. As the uterus enlarges during pregnancy, it sits above and around the bladder, so the bladder can’t hold as much urine and fills quickly. That means you’ll feel the urge to urinate more often, especially in the second and third trimesters and sometimes at night.

Increased urine production from pregnancy (due to higher blood volume and kidney filtration) can occur, but it isn’t the main reason for the frequency—that mechanical compression is. Tiny changes like mild kidney enlargement aren’t the primary drivers. Dehydration would actually reduce urine output, not increase how often you need to go.