Pregnant women should see their doctor if they have any symptoms of a UTI. Without treatment, a UTI can cause serious complications.
The American College of Obstetricians and Gynecologists (ACOG) advise that pregnant women avoid nitrofurantoin and trimethoprim-sulfamethoxazole during the first trimester. These antibiotics can cause birth abnormalities if a person takes them at this stage of their pregnancy.
According to a 2015 review, studies show that both nitrofurantoin and trimethoprim-sulfamethoxazole are generally safe during the second and third trimesters. However, taking either antibiotic in the final week before delivery may increase the risk of jaundice in newborns.
If pregnant women develop a kidney infection during pregnancy, they will need treatment in the hospital. This treatment will involve antibiotics and intravenous fluids.
A short course of antibiotics is unlikely to cause any harm to a developing fetus. Research suggests that the benefits of taking antibiotics to treat a UTI far outweigh the risks of leaving a UTI without treatment.
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