Can a UTI Cause a Miscarriage or Pregnancy Complications?

Rebekah Kuschmider
Rebekah Kuschmider
March 17, 2025
5
min read
Technically reviewed by: 
Taylor Steed
Can a UTI Cause a Miscarriage or Pregnancy Complications?
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Urinary tract infections (UTIs) are common during pregnancy and cause many pregnant women to worry, "Can a UTI cause a miscarriage?" While they can be stressful or uncomfortable, UTIs don't typically pose any risk to a pregnancy or lead to a miscarriage [1].

However, it is important to treat a UTI promptly. If a UTI is left untreated, the infection can get worse, which can lead to pregnancy complications.

Routine urine testing is part of standard prenatal care. When testing reveals a UTI, doctors can prescribe antibiotics that treat the infection without harming the fetus.

UTI-Related Pregnancy Risks

It's very common to develop UTIs during pregnancy. While UTIs typically get better with treatment, pregnancy can mask UTI symptoms, which can result in delayed treatment. If this happens, there is a risk that the infection can get worse and cause complications during pregnancy [2].

A urinary tract infection (UTI) during pregnancy can lead to several complications, depending on its severity.

Preterm labor is a potential risk, as UTI-related inflammation may trigger contractions and cause early delivery. This carries a moderate to high risk, depending on how quickly the infection is treated.

If a UTI spreads to the kidneys, it can result in a kidney infection, which poses a high risk to both the mother and baby, potentially leading to serious health concerns.

Infections can also interfere with fetal growth, increasing the likelihood of low birth weight, a moderate risk that may affect the baby’s development.

In more severe cases, the infection can reach the amniotic sac, leading to complications that pose a high risk to pregnancy.

Prompt diagnosis and treatment of UTIs are essential to reducing these risks and ensuring a healthy pregnancy.

Urine testing can help you detect a UTI even when you are not having symptoms. Your doctor may do tests during prenatal visits, but you can also use home tests to perform more frequent checks.

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How to Treat a UTI Safely During Pregnancy

If you have a UTI during pregnancy, it's crucial to talk to health professionals, such as your primary care physician or obstetrician. Medical professionals will know which UTI treatments are safe for you and your fetus during pregnancy. If you visit an urgent care clinic or a new doctor, be sure to tell staff you are pregnant. You can also double-check with the pharmacist when you pick up your prescription to be sure that it is safe during pregnancy.

Antibiotics are the best treatment for UTI during pregnancy. They quickly and safely treat the infection and prevent it from spreading to your kidneys, your bloodstream, or the amniotic fluid. Delaying or refusing antibiotics increases your risk of complications, including preterm labor.  

Antibiotics that are considered safe for treating a UTI during pregnancy, include [3]:

  • Cephalexin (Keflex)
  • Amoxicillin
  • Nitrofurantoin (Macrobid) (only used before the 3rd trimester.)

Antibiotics that should be avoided due to pregnancy-related complications include [3]:

  • Fluoroquinolones (Ciprofloxacin): Linked to fetal cartilage damage.
  • Tetracyclines: Can cause tooth discoloration in babies.

How to Prevent UTIs in Pregnancy

You can take easy steps to lower the chances of contracting a UTI during pregnancy, including:

  • Hydration: Drink plenty of fluids, such as water or non-caffeinated beverages. Cranberry juice may help prevent bacteria from adhering to the inside of your urinary tract.
  • Hygiene: Always wipe from front to back after using the bathroom. This ensures that bacteria from feces don't reach the urinary opening.
  • Empty your bladder: Try to empty your bladder completely every time you urinate. Gently arching your back or lifting your belly to take the weight off your bladder may help with this process.
  • Urinate after intercourse: Emptying your bladder after sexual contact can help flush out any bacteria that entered the urinary tract during intercourse.

When to See a Doctor?

Talk to your doctor right away if you suspect you have a UTI during pregnancy. Prompt treatment helps prevent infection from spreading or getting worse.  You should call your doctor right away if symptoms persist after beginning treatment, or if symptoms worsen. Fever, chills or severe pain can be a sign of a kidney infection and you should see a doctor immediately.

Key Takeaways

UTIs are common in pregnancy and are not typically a cause for concern. Most UTIs can be treated with pregnancy-safe antibiotics. Routine urine testing can identify asymptomatic UTIs so you can get treatment right away.

Diagnox UTI Test Strips are a safe, easy way to check for UTIs during pregnancy so you can get treatment as soon as you need it.

References

[1] Cleveland Clinic Staff, "UTI During Pregnancy," Cleveland Clinic, Available Online [Accessed March 4, 2025].

[2] Children's Hospital of Philadelphia Staff, "Urinary Tract and Kidney Infections during Pregnancy," Children's Hospital of Philadelphia, Available Online [Accessed March 4, 2025].

[3] N. Cieri-Hutcherson, "What Antibiotics Can You Take While You’re Pregnant?" GoodRx, Available Online [Accessed March 4, 2025].

About the Author
Rebekah Kuschmider

Rebekah has been writing about culture, health, and politics since 2010. She has a masters degree in Arts Policy and Administration from The Ohio State University. Her work has been seen at WebMD, The Candidly, MedicineNet, YourTango, Ravishly, Babble, Scary Mommy, Salon, Role Reboot, The Good Men Project, SheSaid, Huffington Post, and Mamamia. She is a former cohost of the weekly podcast The More Perfect Union. Rebekah lives in Maryland with her husband, two kids, and a dog who sheds a lot.

About the Reviewer
This blog was
Technically reviewed by: 
Taylor Steed

Taylor Steed played a crucial role in ensuring the quality of this blog by serving as its editor and proofreader.

The blog was also reviewed by the Diagnox content team. Diagnox Staff consists of a multidisciplinary team of scientists, content writers, and healthcare professionals with an expertise to create and review high-quality, informative, accurate, and easy-to-understand content for both professionals and everyday readers. Our staff follows strict guidelines to ensure the credibility and authenticity of the information, reviewing them independently and verifying them by various scientific and technical sources to ensure accuracy. Our review team believes in delivering knowledge free from bias to improve public health and well-being.

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