Fever During Pregnancy: Causes, Risks, and What to Do
Fever during pregnancy can be worrying, but knowing what to watch for and how to respond helps keep you and your baby safe. If you develop a fever over 100.4°F (38°C) while pregnant, pay close attention to your symptoms and reach out to your doctor if needed. Fever in pregnancy is not considered normal, especially if it persists or is accompanied by other complaints.
While fever itself is a sign that something is going on, most cases can be managed well when the cause is identified early. Feeling anxious is natural, but with the right information, you can make confident decisions for your health and your baby's.
What Counts as a Fever in Pregnancy? 🌡️
A fever in pregnancy means a body temperature above 100.4°F (38°C). Mild elevations (99–99.5°F / 37–37.5°C) are usually harmless, but sustained higher temperatures need attention. Remember, fever is a symptom—not a disease—and can have many causes.
Why Is Fever a Risk During Pregnancy?
Your baby's development is sensitive to temperature changes, especially in the first trimester. Ongoing high fever can raise the risk of miscarriage or birth defects. That's why it's important not to ignore symptoms and to act promptly.
Common Causes of Fever in Pregnancy
Infections
- Flu, colds: More common in fall and winter.
- Urinary tract infections: Frequent during pregnancy; look for fever plus burning or frequent urination.
- Strep throat, tonsillitis: Fever, sore throat, trouble swallowing.
- Stomach bugs: Vomiting, diarrhea, and fever.
Other Causes
- Autoimmune conditions: Rare, but possible.
- Medication reactions: Some medicines can cause fever as a side effect.
How Does Fever Affect the Baby?
Your body temperature directly impacts your baby. Prolonged high fever can increase fetal stress, and certain stages of development—like the formation of the nervous system—are especially sensitive. Lowering fever quickly is most important in the first trimester.
Practical Tips: What to Do If You Have a Fever
- Check your temperature regularly with a digital thermometer.
- Rest as much as possible and avoid strenuous activity.
- Stay hydrated with water or herbal teas.
- Avoid hot baths when you have a fever.
- Cool compresses on your forehead can help you feel better.
- Do not take over-the-counter fever reducers without medical advice—some ingredients are unsafe in pregnancy.
When to Call Your Doctor
Contact your healthcare provider immediately if:
- Your fever is above 100.4°F (38°C) and doesn't go down within 24 hours
- You have severe abdominal pain, rash, shortness of breath, or dizziness
- You notice urinary symptoms, severe headache, or neck stiffness
- You experience bleeding or decreased fetal movement along with fever
Take any unusual symptoms seriously during pregnancy.
Medical Background: What Happens in Your Body During Fever?
Fever is your immune system's response to infection or inflammation. The hypothalamus in your brain raises your body's "thermostat" to help fight germs. While this helps you recover, sustained high temperatures can be risky for your baby.
Possible Risks
- Miscarriage: Especially in the first trimester with prolonged high fever.
- Birth defects: Problems with brain or heart development.
- Preterm birth: Can occur with severe infections.
Don't panic, but don't ignore your symptoms either.
What NOT to Do If You Have a Fever
- Don't use over-the-counter medications without your doctor's approval.
- Don't use alcohol-based compresses.
- Don't delay medical consultation if your fever persists or you have other symptoms.
Supportive Thoughts for Expecting Moms 💛
Fever during pregnancy can feel scary, but most cases are manageable when you act early and get the right care. Remember, you're not alone—uncertainty is normal, but gathering reliable information helps you feel more confident. If you have questions, reach out to a professional and listen to your body's signals.
Find more helpful guides and tips in our app to support you throughout your pregnancy journey.