Varicella (Chicken Pox) Exposure While Pregnant
Medically reviewed by Dr. Lisa Okafor, MD, FACOG · Board-Certified OB-GYN
Content reviewed against published ACOG, CDC, NIH guidelines
Last reviewed:
Your health matters just as much as your baby's. If you are dealing with varicella (chicken pox) exposure while pregnant, here is what you need to know.
The short answer
Varicella (chickenpox) during pregnancy can cause complications for both parent and baby, including varicella pneumonia in the parent and congenital varicella syndrome in the baby (rare, mostly with first/second trimester infection). Most adults are immune through vaccination or previous infection. If you are exposed and unsure of your immunity, contact your provider immediately for testing.
Key takeaways
- Varicella (chickenpox) during pregnancy can cause complications for both parent and baby, including varicella pneumonia in the parent and congenital varicella syndrome in the baby (rare, mostly with first/second trimester infection). Most adults are immune through vaccination or previous infection. If you are exposed and unsure of your immunity, contact your provider immediately for testing.
- Usually normal when: Having documented immunity through vaccination or previous infection
- Call your doctor if: You are not immune and have been exposed to chickenpox - contact your provider within 24 hours for possible VZIG
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What Parents Should Know
According to ACOG, CDC, NIH guidelines, varicella (chickenpox) during pregnancy can cause complications for both parent and baby, including varicella pneumonia in the parent and congenital varicella syndrome in the baby (rare, mostly with first/second trimester infection). Most adults are immune through vaccination or previous infection. If you are exposed and unsure of your immunity, contact your provider immediately for testing. At First trimester, varicella infection between 8-20 weeks carries the highest (but still low - about 1-2%) risk of congenital varicella syndrome. If you are exposed and not immune, varicella-zoster immune globulin (VZIG) given within 96 hours of exposure can prevent or reduce severity of infection. The varicella vaccine itself should NOT be given during pregnancy. It is generally considered normal when having documented immunity through vaccination or previous infection. However, you should contact your pediatrician promptly if you are not immune and have been exposed to chickenpox - contact your provider within 24 hours for possible VZIG.
Normal vs. Concerning
By Age
What to expect by age
First trimester
Varicella infection between 8-20 weeks carries the highest (but still low - about 1-2%) risk of congenital varicella syndrome. If you are exposed and not immune, varicella-zoster immune globulin (VZIG) given within 96 hours of exposure can prevent or reduce severity of infection. The varicella vaccine itself should NOT be given during pregnancy.
Third trimester
Varicella infection around the time of delivery (5 days before to 2 days after) is the most dangerous timing for the newborn. The baby may develop severe neonatal varicella. If you develop chickenpox near your due date, your medical team will take steps to protect the baby.
What to Tell Your Pediatrician
- Describe when you first noticed varicella (chicken pox) exposure while pregnant and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you have been exposed to someone with chickenpox or shingles and are unsure of your immunity.
- Mention if you do not know if you were vaccinated or had chickenpox as a child.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Having documented immunity through vaccination or previous infection
- Being exposed to chickenpox when you are known to be immune
- You have been exposed to someone with chickenpox or shingles and are unsure of your immunity
- You do not know if you were vaccinated or had chickenpox as a child
- You are not immune and have been exposed to chickenpox - contact your provider within 24 hours for possible VZIG
- You develop a vesicular rash (fluid-filled blisters) during pregnancy
- Chickenpox symptoms near your due date
What You Can Do at Home
- Keep track of when you notice varicella (chicken pox) exposure while pregnant — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that having documented immunity through vaccination or previous infection — this is generally within the range of normal.
- At First trimester, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Prioritize your own rest and nutrition. Accept help when offered, and do not hesitate to reach out to your healthcare provider.
- While monitoring at home, seek immediate care if you are not immune and have been exposed to chickenpox - contact your provider within 24 hours for possible VZIG.
Related Conditions
Parvovirus B19 (Fifth Disease) in Pregnancy
Fifth disease (caused by Parvovirus B19) is usually mild in adults but can pose risks during pregnancy, including fetal anemia and hydrops fetalis in rare cases. About 50-60% of adults are already immune from childhood exposure. If you are exposed during pregnancy, blood testing can determine your immunity status and guide monitoring.
CMV (Cytomegalovirus) Infection Risk in Pregnancy
CMV is the most common congenital infection, affecting about 1 in 200 babies. Many adults already have CMV antibodies. Primary (first-time) CMV infection during pregnancy carries the highest risk to the baby. Prevention centers on frequent hand washing, especially after contact with young children's saliva, urine, and other body fluids.
Related Resources
Frequently asked questions
Is varicella (chicken pox) exposure while pregnant normal?
When should I call the doctor about varicella (chicken pox) exposure while pregnant?
When is varicella (chicken pox) exposure while pregnant normal?
What causes varicella (chicken pox) exposure while pregnant?
What should I mention to my pediatrician about varicella (chicken pox) exposure while pregnant?
Is varicella (chicken pox) exposure while pregnant normal at First trimester?
Is varicella (chicken pox) exposure while pregnant normal at Third trimester?
Should I go to the ER for varicella (chicken pox) exposure while pregnant?
Does varicella (chicken pox) exposure while pregnant go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Varicella (Chicken Pox) Exposure While Pregnant.
Things to mention
- Describe when you first noticed varicella (chicken pox) exposure while pregnant and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you have been exposed to someone with chickenpox or shingles and are unsure of your immunity.
- Mention if you do not know if you were vaccinated or had chickenpox as a child.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- You have been exposed to someone with chickenpox or shingles and are unsure of your immunity
- You do not know if you were vaccinated or had chickenpox as a child
Urgent signs to report immediately
- You are not immune and have been exposed to chickenpox - contact your provider within 24 hours for possible VZIG
- You develop a vesicular rash (fluid-filled blisters) during pregnancy
- Chickenpox symptoms near your due date
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of varicella (chicken pox) exposure while pregnant are normal. Talk to your pediatrician if you are not immune and have been exposed to chickenpox - contact your provider within 24 hours for possible vzig.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Parvovirus B19 (Fifth Disease) in Pregnancy
Fifth disease (caused by Parvovirus B19) is usually mild in adults but can pose risks during pregnancy, including fetal anemia and hydrops fetalis in rare cases. About 50-60% of adults are already immune from childhood exposure. If you are exposed during pregnancy, blood testing can determine your immunity status and guide monitoring.
CMV (Cytomegalovirus) Infection Risk in Pregnancy
CMV is the most common congenital infection, affecting about 1 in 200 babies. Many adults already have CMV antibodies. Primary (first-time) CMV infection during pregnancy carries the highest risk to the baby. Prevention centers on frequent hand washing, especially after contact with young children's saliva, urine, and other body fluids.
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