Some people are more likely than others to develop bladder infections or repeated urinary tract infections. Women can have this problem. A key reason is physical anatomy. Women have a short urethra. This means bacteria that can cause an infection don't have as far to travel to reach the bladder. You may be at greater risk of bladder infections or repeated UTIs if you: Are sexually active. During sex, bacteria can be pushed into the urethra. Use certain types of birth control. Using a diaphragm increases the risk of a UTI. Diaphragms that contain spermicide may increase risk even more. Are pregnant. Hormone changes during pregnancy may increase the risk of a bladder infection. Have gone through menopause. Changes to hormones that happen after menopause often can lead to UTIs.