Your pregnant body How the bladder works The bladder is a
balloon-shaped muscle that stores urine. Muscles under the
bladder keep the urethra (the tube where urine leaves your body)
closed and keep urine from leaking out. The pressure of a full
bladder signals your brain, giving you the “urge” to urinate.
When you urinate, the muscles around the urethra relax and the
bladder tightens to squeeze urine out. Causes of frequent
urination during pregnancy Your need to go to the bathroom will
change throughout the stages of pregnancy. Sometimes, you may
feel the need to urinate more often. Other times, you’ll feel
like you’re back to normal. - In the first weeks of pregnancy,
your body produces a hormone called human chorionic gonadotropin
(hCG), which can make you urinate more often. - Your body
contains more fluid during pregnancy. - Your kidneys work harder
throughout your pregnancy to flush waste products out of your
body. - As the uterus grows and rises higher during the second
trimester, some women find that