OB-GYN
Infections and Immunizations in Pregnancy
Our women’s health care team provides vaccine counseling to help you figure out which vaccines you need and when. We offer all the recommended immunizations for pregnant people.
Medically reviewed by Clara Paik, M.D. on Oct. 12, 2023.
Experts Ready to Help You Stay Well During Pregnancy
The maternity specialists at UC Davis Health are knowledgeable about vaccine safety before and during pregnancy and while breastfeeding. We’ll answer your questions and provide any information you need regarding immunizations.
On this page
Recommended Vaccines: Before and During Pregnancy
Certain vaccines to protect against infectious diseases are recommended before and during your pregnancy to protect your health and your baby's health.
Talk with your provider about receiving the following immunizations before you become pregnant:
- Chickenpox (varicella)
- Human papillomavirus (HPV)
- Measles, mumps and rubella (MMR)
The following vaccines are recommended during pregnancy:
Symptoms of Infections During Pregnancy
Some infections do not cause symptoms. Any symptoms you experience will depend on the disease you develop.
Common Symptoms
Common symptoms of infections during pregnancy include:
- Body aches
- Fatigue
- Fever
- Nausea and vomiting
- Pain during urination
- Vaginal burning, itching or pain
Emergency Symptoms
Seek immediate medical care if you have any of the following:
- Difficulty breathing
- Fever of 103 degrees or more
- Spotty rash on your face, neck or body
- Yellowing of your eyes or skin
Health Risks from Infections During Pregnancy
Pregnancy causes changes in your body’s hormone levels and immune system. These changes make you more likely to get certain infectious diseases and more likely to have severe symptoms.
Some infections pose a risk only to your health. Others can impact both your health and your baby’s health.
Birth Abnormalities
A chickenpox infection during pregnancy can cause birth abnormalities that affect your baby’s arms, brain, eyes and legs.
Low Birth Weight
Sexually transmitted diseases and rubella increase the risk of your baby being born with a low birth weight.
Premature Birth
Many infections increase your risk of giving birth before 37 weeks of pregnancy.
Diagnosing Infections During Pregnancy
Our maternity care team is skilled in accurately diagnosing infections that occur during pregnancy. Your provider will discuss your medical history and symptoms. They may also recommend the following tests:
- Blood tests to detect infections like HIV, hepatitis and rubella
- Urinalysis to check for bacteria or a urinary tract infection
- Vaginal swab to test for group B streptococcus and sexually transmitted infections
Treatment for Infections During Pregnancy
Our providers offer safe and effective treatments for infections that arise during pregnancy. We’ll monitor you and your baby throughout your pregnancy. Your treatment will depend on your condition.
Treatment options may include:
Antibiotics
Antibiotic medications like penicillin and erythromycin treat bacterial infections. They are safe to take during pregnancy.
Antiviral Medications
Antiviral medicines treat viruses like COVID-19, herpes and influenza.
Preventing Infection During Pregnancy
Immunizations are one way to protect yourself and your baby from many infectious diseases. You can also take the following precautions:
- Avoid unpasteurized dairy products
- Follow safe sex practices
- Fully cook all meat and fish before eating
- Have someone else in your household change the cat litter box
- Wash your hands with soap and water throughout the day
Effectiveness of flu shots
40%Reduced risk of hospitalization for pregnant women with influenza
Source: American College of Obstetricians and Gynecologists: Maternal Immunization Task Force
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