Lying across the bottom of your pelvis is an important muscle called the pelvic floor, one of its jobs is to support your bladder. During pregnancy your pelvic floor relaxes slightly. This can lead to stress incontinence where the bladder leaks a small amount of urine when you cough, sneeze, laugh, jump or run. You will be encouraged by your midwife to do pelvic floor exercises both during and after pregnancy to strengthen this muscle and reduce the risk of stress incontinence. Your midwife can give you more information on these exercises.
Attribution: BUPA