How long does frequent urination during pregnancy last?
Nov 14, 2025
Source: Cainiu Health
Dr. Zhang Lu
Introduction
In general, frequent urination during pregnancy is more noticeable in the first and third trimesters, tends to ease during the second trimester, and gradually resolves within 1–2 weeks after delivery for most individuals. The exact duration varies due to individual differences. There is no need to deliberately restrict fluid intake during pregnancy; however, it is advisable to maintain adequate hydration during the day while reducing fluid consumption 1–2 hours before bedtime. Make sure to fully empty the bladder when urinating and avoid holding urine to prevent discomfort.
In general, frequent urination during pregnancy is more noticeable in the first and third trimesters, tends to ease during the second trimester, and gradually resolves within 1–2 weeks after delivery for most women. The exact duration varies depending on individual differences. Detailed explanations are as follows:
In early pregnancy, hormonal changes cause increased blood flow to the uterus, leading to uterine enlargement that compresses the bladder and reduces its capacity, thereby causing frequent urination. Symptoms at this stage are usually mild. As pregnancy progresses into the second trimester, the growing uterus rises out of the pelvic cavity, reducing pressure on the bladder, so urinary frequency naturally improves and may even disappear completely in some individuals.
In late pregnancy, rapid fetal growth causes further uterine enlargement, and the descending fetal head directly compresses the bladder, leading to a recurrence of frequent urination—often more pronounced than in early pregnancy. Some individuals may also experience a sensation of incomplete bladder emptying. This condition persists until delivery; after childbirth, as the uterus shrinks and bladder pressure is relieved, urinary frequency gradually improves.
There is no need to deliberately restrict fluid intake during pregnancy. It's advisable to drink adequate fluids during the day but reduce fluid consumption 1–2 hours before bedtime. Make an effort to fully empty the bladder when urinating and avoid holding in urine to prevent discomfort. Wearing loose-fitting clothing and avoiding abdominal pressure can also help alleviate the inconvenience caused by frequent urination.
