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Flu While Pregnant

Medically Reviewed.Last updated on 07/08/2026.

Flu in pregnancy is a serious yet treatable illness. Pregnant women are more likely to be hospitalized for the flu than nonpregnant women. When you’re diagnosed early, pregnancy-safe treatments can help reduce your symptoms and shorten the length of the illness. Getting an annual flu shot is the best way to prevent the flu.

What Is Flu While Pregnant?

Influenza (flu) is a common viral infection that spreads from person to person. It spreads through the air and on surfaces when someone with the flu coughs, sneezes or talks.

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Having the flu during pregnancy can lead to severe illness, including a higher chance of hospitalization and developing pneumonia. Call your healthcare provider if you’re pregnant and have flu-like symptoms.

Symptoms and Causes

Symptoms of flu during pregnancy

You can have one or many of the following symptoms of the flu:

  • Body aches
  • Chills
  • Dry cough
  • Fever (usually sudden)
  • Headache
  • Loss of appetite
  • Runny nose
  • Severe tiredness
  • Sore throat
  • Stuffy nose
  • Vomiting

Some flu symptoms are also typical pregnancy symptoms. To figure out what you’re experiencing, it can help to consider:

  • If you’ve been around sick people
  • How suddenly your symptoms started
  • If you also have a fever, chills or body aches (symptoms that are more typical of the flu than pregnancy)

Flu in pregnancy causes

The same virus causes the flu in everyone. It mainly infects your lungs, nose and throat. It causes symptoms similar to a cold. It also spreads easily. You can get the flu by breathing in the virus or by touching something that has the virus on it.

The flu is contagious beginning one day before symptoms start. That means you can catch the flu from someone who doesn’t yet know they have it. And they’re still contagious five to seven days after actually feeling sick.

Can flu cause low amniotic fluid?

It can affect amniotic fluid levels, but it’s not a direct cause. The flu can lead to fever and dehydration. These factors may temporarily affect amniotic fluid volume.

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Severe infections can also affect the placenta by reducing blood flow to the fetus or causing inflammation. This could lead to the fetus making less pee, which changes how much amniotic fluid you have.

Risk factors

You’re at a higher risk of getting the flu when you’re pregnant compared to when you’re not pregnant. That’s because pregnancy naturally suppresses your immune system. It also changes how hard your lungs need to work. This increases your risk of infections like the flu and makes it harder to breathe.

One study found that you’re most likely to get the flu in your first trimester. Your risk increases the longer you’re pregnant during peak flu season (usually November to February).

Complications of the flu during pregnancy

If you get the flu while pregnant, you’re more likely to need to go to the hospital for treatment than if you weren’t pregnant. That’s because it can cause complications like:

  • Dehydration (and requiring IV fluids)
  • Pneumonia
  • Preterm labor
  • Worsening of health conditions like asthma or heart disease

Can the flu cause miscarriage?

Studies have shown that flu during pregnancy increases your risk of miscarriagepreterm birth and low birth weight. That’s why it’s so important to take steps to protect yourself, like getting a flu shot and seeking care right away if you feel sick.

Diagnosis and Tests

How doctors diagnose the flu in pregnancy

Healthcare providers use a flu test to confirm you have the virus. They’ll wipe the inside of your nose or the back of your throat with a long cotton swab.

Some flu test results are available in less than 30 minutes (rapid tests). Other tests get sent to a lab, so it can take several days to get results.

Management and Treatment

How is the flu treated during pregnancy?

If you’re diagnosed early, your healthcare provider may prescribe an antiviral medication. While antivirals don’t cure the flu, they can stop symptoms from getting worse. Many providers prefer the oral antiviral oseltamivir (Tamiflu®) for pregnant women.

Talk to your provider about other medications you can safely take during pregnancy. These may include:

  • Acetaminophen (Tylenol®) to reduce flu symptoms, especially fever
  • Dextromethorphan (Robitussin®-DM or Delsym®), guaifenesin (Mucinex®) or cough drops

How long does it take to recover?

If your healthcare provider prescribes an antiviral, you should feel it working within a day or two. Over-the-counter pain and fever medications can start helping right away.

You should notice an improvement in your symptoms within five to seven days. If you don’t start feeling better after a week, call your provider.

When should I see my healthcare provider?

See your healthcare provider if you notice any flu symptoms or any symptoms that seem unusual or concerning.

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Go to the nearest emergency room if you have any of these severe flu symptoms:

  • Dizziness, confusion or the inability to wake up
  • Extreme weakness
  • High fever that doesn’t change after taking acetaminophen
  • Not feeling the fetus move
  • Not peeing for an extended period
  • Ongoing pain or pressure in your chest or abdomen
  • Seizures
  • Trouble breathing or shortness of breath

Outlook / Prognosis

What can I expect if I have this condition?

With early diagnosis and treatment, you’ll recover from the flu with no problems. But you do have a higher chance of getting serious complications from the flu. Make sure to rest and drink plenty of fluids to avoid dehydration. Take over-the-counter medications like acetaminophen to help your symptoms. Flu symptoms can last for a week or more. It’s important to take extra care of yourself during this time.

Prevention

How can I prevent flu in pregnancy?

The best way to prevent flu during pregnancy is by getting a flu shot. The best time to get your flu shot is before flu season starts. But you can get it at any time.

You should also follow general flu prevention best practices:

  • Avoid contact with people who are sick.
  • Avoid touching your eyes or nose.
  • Clean surfaces at home and work with disinfectant.
  • Wash your hands frequently.

A note from Cleveland Clinic

Getting the flu is never fun, but it can be especially difficult while you’re pregnant. It can also be more serious. Contact your healthcare provider if you notice any signs of the flu. Early treatment with antiviral medications can help you feel better sooner. Getting a flu shot during pregnancy is the best way to protect you and your baby.

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Medically Reviewed.Last updated on 07/08/2026.

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References

Cleveland Clinic’s health articles are based on evidence-backed information and review by medical professionals to ensure accuracy, reliability and up-to-date clinical standards.

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