Fever and Chills During Pregnancy: Signs, Causes, and Care
Learn how fever and chills affect pregnancy, what causes them, and when you should seek medical advice.
Fever and Chills During Pregnancy: What Every Expectant Parent Should Know
Experiencing fever and chills during pregnancy can be worrisome for many expectant parents. These symptoms may arise from ordinary causes such as mild infections or hormonal shifts, but in some cases, they may indicate underlying health concerns that require prompt medical assessment. This article explains why fever and chills can occur during pregnancy, explores potential risks, and provides practical guidance for care.
Are Chills and Fever Early Pregnancy Symptoms?
Many pregnant individuals notice subtle changes in their bodies even before a missed period, including shifts in body temperature. Feeling feverish or developing chills is often a result of hormonal changes after conception, notably from rising progesterone levels that affect the hypothalamus (the part of the brain regulating temperature).
- A slight rise in body temperature can accompany conception and early pregnancy.
- Some women report chills especially during the first trimester, often after feelings of coldness or inability to warm up, particularly at night.
- Occasional chills or mild fever can be a part of normal pregnancy adaptation but are not a definitive sign of pregnancy on their own.
It is important not to rely solely on fever or chills as a sign of pregnancy. If you suspect you are pregnant and have these symptoms, take a pregnancy test and consult your healthcare provider.
Other Early Pregnancy Symptoms
- Spotting and cramping: Related to implantation of the embryo into the uterine lining.
- Increased breast size: Swelling and tenderness, sometimes with darker areolas.
- Nausea: Morning sickness with or without vomiting.
- Missed period: Common sign but can be due to other factors.
- Frequent urination: The body processes more fluids during pregnancy.
- Nasal congestion: Due to hormonal and blood-volume changes.
What Causes Chills and Fever During Pregnancy?
There are many possible causes for chills and fever during pregnancy, ranging from normal physiological changes to underlying medical issues. Understanding the most common triggers can help you decide when to seek help or simply rest and recover.
Hormonal Changes
Hormonal fluctuations, especially in the first trimester, can affect your internal thermostat. Progesterone surges can produce episodes of sweating or sudden chills. These changes, while uncomfortable, are typically temporary and resolve as pregnancy progresses.
Fatigue
Pregnant bodies require more energy and rest. Lack of sleep or constant fatigue disrupts the body’s ability to regulate temperature, sometimes leading to chills even in otherwise healthy pregnancies.
Low Blood Pressure
Some women experience lower-than-normal blood pressure during pregnancy. When blood pressure drops — often below 90/60 mmHg — symptoms may include:
- Clammy skin
- Nausea
- Dizziness or fainting
- Blurred vision
- Weak, fast pulse
- Chills or feeling cold
Common Illnesses
Sometimes chills and fever signal an underlying infection. The following are frequent culprits:
| Condition | Common Symptoms | Risks During Pregnancy |
|---|---|---|
| Flu | High fever, chills, muscle aches, cough | Greater risk of severe illness, complications |
| Common Cold | Low-grade fever, chills, sore throat, runny nose | Usually mild, self-resolving |
| Urinary Tract Infection (UTI) | Chills, fever, frequent urination, pain | Potential risk of kidney infection if untreated |
| Stomach Bug | Fever, chills, nausea, vomiting, diarrhea | Dehydration, nutritional risks |
| Serious Infections (e.g., Listeriosis, Toxoplasmosis) | High fever, chills, systemic symptoms | May affect fetal development |
Rare Causes
- Thyroid Disorders: Hypothyroidism may trigger persistent chills; hyperthyroidism may cause sweating.
- Anemia: Iron-deficiency anemia makes it harder for the body to maintain heat and fight fatigue.
- Preeclampsia: In later pregnancy, chills paired with other symptoms (high blood pressure, swelling, headaches) may signal preeclampsia, needing urgent evaluation.
How Do Chills and Fever Impact Pregnancy?
Light chills or a brief, mild fever are not usually dangerous. However, sustained high fever or chills, especially in the first trimester, can present risks for both mother and fetus.
Risks to the Baby
- Prolonged or high fevers, particularly in early pregnancy, may raise the risk of neural tube defects (problems in fetal brain and spinal cord development).
- Serious infections can sometimes cross the placenta, directly affecting the fetus or causing complications like preterm labor.
- Maternal fever leads to a temporary increase in fetal heart rate; this is usually harmless but should be monitored if prolonged.
Risks to the Mother
- Infections may result in dehydration, nutrient losses, or other complications.
- Underlying conditions like the flu or kidney infection may become more severe in pregnancy than outside of it.
When Should You Call Your Doctor?
You should always tell your healthcare provider about significant fever or chills during pregnancy. While many causes are routine and not dangerous, some signal complications needing immediate care.
- Temperature of 100°F (37.8°C) or higher that persists.
- Chills and a fever accompanied by: severe headache, visual changes, swelling, chest or abdominal pain, breathing difficulties, reduced fetal movement, or vaginal bleeding.
- Signs of infection: painful urination, persistent cough, skin changes, or gut symptoms like vomiting/diarrhea.
- Severe dehydration or unable to keep fluids down for more than 24 hours.
Prompt evaluation can rule out dangerous conditions and provide peace of mind.
Diagnosis: Determining the Cause
To find the cause of chills or fever during pregnancy, your healthcare provider may:
- Take a detailed history of symptoms (duration, other signs).
- Perform a physical exam.
- Order lab tests if needed: urine test, blood test, throat swab, or imaging.
- Review prenatal medical history for risk factors (chronic illnesses, previous complications).
Managing Fever and Chills: Safe Self-Care During Pregnancy
If your symptoms are mild and you’re otherwise feeling well, basic self-care may be enough. Consider the following strategies:
- Stay hydrated: Drink plenty of water, herbal teas, or clear broths.
- Rest: Prioritize sleep and relaxation. Fatigue can worsen illness and slow recovery.
- Dress appropriately: Layers make it easier to adjust for chills or fever.
- Monitor symptoms: Track your temperature regularly with a thermometer. Note any new symptoms.
- Use safe medications: Always consult your provider before taking fever reducers (like acetaminophen). Avoid ibuprofen unless specifically recommended.
- Eat balanced meals: Even if appetite is reduced, choose nutrient-rich, easy-to-digest foods.
Avoid self-medicating with over-the-counter flu or cold remedies without medical advice, especially as some are unsafe during pregnancy.
Preventing Fever and Chills in Pregnancy
- Get vaccinated: The annual flu vaccine is recommended for pregnant women due to higher risk of severe flu complications.
- Practice good hygiene: Frequent handwashing, avoiding contact with sick individuals, and disinfecting surfaces can limit exposure.
- Manage chronic conditions: Talk to your provider about thyroid, anemia, or blood pressure issues for tailored management.
- Maintain regular prenatal visits: This ensures early identification of problems and timely interventions.
Frequently Asked Questions (FAQs)
Why do I feel cold and shiver during early pregnancy?
Chills in early pregnancy are often due to hormonal changes, particularly progesterone. They can also result from fatigue, low blood pressure, or sometimes mild viral infections.
Is having a fever during pregnancy dangerous?
Mild, brief fevers are usually benign. Prolonged or high fevers — especially in the first trimester — may carry a modest risk for birth defects and require medical attention.
What should I do if I have chills but no fever?
If you feel cold or shiver without a fever and have no other severe symptoms, rest and hydration are often sufficient. If chills persist or are accompanied by dizziness, fainting, or other concerning symptoms, consult your healthcare provider.
Can the flu harm my baby during pregnancy?
Pregnant individuals are more likely to experience severe illness due to flu, which can increase the risk of complications like pneumonia, preterm birth, or low birth weight. Getting vaccinated and prompt treatment is recommended.
How do I treat a fever when pregnant?
Use acetaminophen as advised by your provider, stay hydrated, and rest. Avoid ibuprofen unless instructed, and seek medical care if the fever is high or persistent.
Key Takeaways
- Fever and chills can be routine or signals of deeper health concerns during pregnancy.
- Hormonal, physiological, and immune changes all play roles in temperature regulation.
- Always consult your provider for persistent or high fever, severe chills, or additional worrisome symptoms.
- Basic self-care — hydration, rest, and healthy diet — supports recovery for mild symptoms.
- Regular prenatal care is the best way to ensure prompt assessment and tailored support.
