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UTIs in Pregnancy

Adil Naeem
Reviewed by Adil NaeemReviewed on 23.06.2025 | 8 minutes read
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Urinary Tract Infections (UTIs) are a common concern during pregnancy, affecting up to 10% of expectant mothers. These infections occur when bacteria from the digestive tract enter the urinary system, leading to discomfort and potential complications if left untreated.

Understanding UTIs during pregnancy is crucial for safeguarding the health of both the mother and the developing baby. Pregnant women are more vulnerable to UTIs due to several changes that occur in their bodies. Recognising the symptoms early and seeking prompt treatment can prevent complications such as kidney infections and preterm labour.

This article offers a comprehensive overview of UTIs during pregnancy, including causes, symptoms, increased risk factors, treatment options, and prevention. It also emphasises when to seek medical help to protect both mother and baby.

What is a UTI?

An Urinary Tract Infection (UTI) is an infection that occurs in any part of the urinary system, including the urethra, bladder, and kidneys. Most UTIs are caused by bacteria, particularly Escherichia coli (E. coli), which typically reside in the digestive tract. When these bacteria enter the urinary tract, they can multiply and lead to infection. UTIs can cause symptoms ranging from mild discomfort to severe pain, depending on the location and severity of the infection.

Pregnant women are particularly susceptible to UTIs due to the changes their bodies undergo. Hormonal shifts significantly increase progesterone levels and relax the urinary tract muscles, slowing the urine flow and making it easier for bacteria to thrive. Additionally, the growing uterus can exert pressure on the bladder, further complicating urine flow and increasing the risk of infection.

Why are UTIs common during pregnancy?

During pregnancy, several anatomical and physiological changes increase the risk of developing UTIs. One of the primary factors is the rise in progesterone levels, a hormone that plays a crucial role in maintaining pregnancy. Progesterone causes the muscles of the tubes connecting the kidneys to the bladder to relax, leading to slower urine flow. This slowdown can cause urine to remain in the bladder longer than usual, creating an ideal environment for bacteria to grow and cause infection.

Another significant factor is the increased pressure on the bladder from the expanding uterus as the pregnancy progresses. This pressure can prevent the bladder from emptying, leading to urinary stasis, where some urine remains in the bladder after urination. Urinary stasis further elevates the risk of bacterial growth and subsequent infection.

In addition to these changes, pregnant women often experience a weakening of the immune system, making it harder for the body to fight off infections. This immune suppression, coupled with the changes in the urinary system, means that pregnant women must be particularly vigilant about the signs and symptoms of UTIs. Early detection and treatment are vital to prevent the infection from spreading to the kidneys or causing other complications that could affect the pregnancy.

Symptoms of UTIs in pregnancy

Urinary Tract Infections (UTIs) during pregnancy can present with a variety of symptoms that should not be ignored. Common symptoms include an urgent need to urinate, even if only a tiny amount of urine is produced, and a burning sensation during urination. Pregnant women may also notice cloudy, strong-smelling urine and may experience pelvic discomfort or lower abdominal pain. In some cases, blood may be present in the urine, which is another indication of infection.

It is crucial to be aware of warning signs that may indicate a more severe infection, such as a kidney infection (pyelonephritis). These signs include high fever, chills, back or side pain (especially in the lower back near the kidneys), nausea, and vomiting. A kidney infection can lead to severe complications and requires immediate medical attention.

While the symptoms of UTIs in pregnant women are generally similar to those in non-pregnant women, pregnancy can sometimes mask or alter these symptoms due to the body's many changes. For example, increased urinary frequency is standard in pregnancy, which might be mistaken for typical pregnancy symptoms rather than a UTI. Therefore, pregnant women need to monitor any unusual changes and seek prompt medical advice.

Risks of UTIs in pregnancy

Untreated UTIs during pregnancy can lead to significant risks and complications that may affect both the mother and the baby. One of the most severe complications is the development of a kidney infection (pyelonephritis), which can cause severe illness and increase the risk of preterm labour. Preterm labour, in turn, can lead to premature birth and associated complications, including low birth weight and developmental issues for the baby.

Another potential risk of untreated UTIs is the spread of the infection to the bloodstream, leading to a condition called sepsis, which is life-threatening and requires urgent treatment. In addition, recurring UTIs during pregnancy can lead to chronic kidney issues and increase the likelihood of having recurrent UTIs in future pregnancies.

Early detection and treatment are crucial to prevent these complications.

Regular prenatal visits, during which urine tests are conducted, help ensure that any infections are detected early and treated effectively. This proactive approach minimises the risk of complications, protecting the health of both the mother and the baby.

Treatment options for UTIs during pregnancy

Treating a UTI during pregnancy requires carefully selecting antibiotics that are both effective and safe for the developing baby. These medications are considered safe during pregnancy and are typically prescribed for a 3 to 7-day course, depending on the severity of the infection. It will also depend on which trimester you are in your pregnancy.

Pregnant women must complete the entire course of antibiotics, even if symptoms improve, before finishing the medication. Stopping treatment early can lead to a resurgence of the infection and increase the risk of complications, including the development of antibiotic resistance. If a woman experiences any side effects from the antibiotics, she should consult her healthcare provider for advice rather than discontinuing the medication on her own.

For symptom relief, over-the-counter (OTC) products such as paracetamol can be used to manage pain and discomfort. However, pregnant women should avoid certain OTC medications like ibuprofen, which is not recommended during pregnancy, especially in the later stages.

While the NHS Pharmacy First scheme allows individuals to obtain antibiotics for uncomplicated UTIs from a pharmacist without a GP visit, this option does not apply to pregnant women. Due to the increased risk of complications during pregnancy, pregnant women need to consult their GP or midwife for appropriate care. The healthcare provider will assess the situation and prescribe the safest treatment option.

It is also essential to know when to seek immediate medical attention. Pregnant women should consult their doctor if they experience symptoms such as persistent or worsening pain, fever, or signs of a kidney infection like severe back pain. Recurrent UTIs or complicated cases may require longer courses of antibiotics or additional tests to rule out other underlying issues. In such cases, following the healthcare provider's advice closely is vital to ensure both the mother and baby remain healthy.

Prevention strategies for UTIs during pregnancy

Preventing UTIs during pregnancy involves adopting good hygiene practices, staying hydrated, and making lifestyle adjustments. Here are some effective strategies:

Hygiene practices

Maintaining proper hygiene is crucial in preventing UTIs. Pregnant women should wipe from front to back after using the toilet to prevent bacteria from spreading from the anus to the urethra. Additionally, urinating after intercourse can help flush out any bacteria that may have entered the urinary tract during sexual activity.

Hydration

Drinking plenty of water is essential for flushing bacteria out of the urinary system. Pregnant women should aim to drink at least 8 to 10 glasses of water daily. Staying well-hydrated can dilute urine and reduce the concentration of bacteria, making it less likely for an infection to develop.

Urination habits

Regular urination helps prevent bacteria from building up in the bladder. Pregnant women should avoid holding in urine for extended periods and make it a habit to empty their bladder each time they urinate. This reduces the likelihood of bacterial growth and infection.

Cranberry juice and Probiotics

Some studies suggest that cranberry juice or supplements can help reduce the risk of recurrent UTIs, although the evidence is inconclusive. Cranberries contain compounds that may prevent bacteria from adhering to the urinary tract lining. Additionally, probiotics, such as those found in yoghurt or supplements, may support urinary health by maintaining a healthy balance of bacteria. However, discussing these options with a healthcare provider before incorporating them into a pregnancy routine is essential.

By following these prevention strategies, pregnant women can reduce their risk of developing a UTI and maintain a healthy pregnancy. Regular prenatal visits and open communication with healthcare providers are crucial for preventing and effectively managing UTIs during this critical time.

When to seek medical help

Pregnant women need to know when to seek medical help for a UTI to prevent complications. Signs of a severe UTI or a kidney infection (pyelonephritis) that require immediate medical attention include high fever, chills, severe back or side pain, nausea, vomiting, and blood in the urine. These symptoms suggest that the infection may have spread to the kidneys, which can be particularly dangerous for both the mother and the baby.

Regular prenatal check-ups play a crucial role in monitoring and preventing UTIs. Healthcare providers often perform urine tests during these visits to check for bacteria, even if the patient has no symptoms. Early detection and treatment can prevent the infection from progressing to a more severe stage.

During a medical visit for a suspected UTI, the healthcare provider will typically conduct a urine analysis to confirm the presence of an infection. If confirmed, they will prescribe the appropriate antibiotics safe during pregnancy. Further tests, such as urine cultures or imaging, may be necessary to identify the underlying cause and guide treatment in cases of recurrent or complicated UTIs.

Myths and misconceptions about UTIs in pregnancy

There are several myths and misconceptions about UTIs during pregnancy that need to be addressed. One common myth is that UTIs always cause noticeable symptoms. However, a UTI can be asymptomatic, so regular prenatal urine tests are essential for early detection and treatment.

Another misconception is that all UTI treatments are safe during pregnancy. In reality, some medications, such as certain antibiotics and over-the-counter pain relievers like ibuprofen, should be avoided due to potential risks to the baby. Pregnant women need to consult their healthcare provider before taking any medication.

Finally, some believe that cranberry juice alone can prevent or cure UTIs. While cranberry juice may help reduce the risk of recurrent infections, it is not a substitute for medical treatment. It should be part of a broader preventive approach under a doctor's guidance.

Conclusion

Recognising, treating, and preventing UTIs during pregnancy is crucial for the health of both the mother and the baby. Early detection and appropriate treatment can prevent serious complications, while preventive measures can reduce the risk of recurrence. Pregnant women should be proactive in managing their health by staying informed, adhering to prescribed treatments, and maintaining regular communication with their healthcare providers.

Most UTIs can be effectively managed with proper care during pregnancy, ensuring a safer and healthier pregnancy journey.

The AI in healthwords.ai refers to conversational search, while the only AI tools used for articles are grammar and language improvements -  medical content remains rigorously authored by healthcare professionals.

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Adil Naeem
Reviewed by Adil Naeem
Reviewed on 23.06.2025
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