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Living with Congenital varicella syndrome

An extremely rare condition in which a mother's chickenpox early in pregnancy causes birth differences in her baby.

Understanding Congenital varicella syndrome

Congenital varicella syndrome is an extremely rare condition in which a mother's chickenpox infection early in pregnancy causes differences in her baby.

It is linked to infection up to 20 weeks into pregnancy. Newborns may have low birth weight and differences of the skin, brain, eyes, arms, legs, hands, or feet. The range and severity vary greatly, depending on when in pregnancy the infection happened.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Skin scarring
  • Small head (microcephaly)
  • Cloudy lens of the eye (cataract)
  • Small eyes (microphthalmia)
  • Shorter or smaller limbs
  • Developmental delay

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include eye disease specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Eye disease specialists (ophthalmologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What eye, brain, and skin care does my child need?
What early help can support my child's development?
What should we know before another pregnancy?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn

It is caused by the mother's chickenpox (varicella zoster) infection early in pregnancy, up to about 20 weeks.

Infectious

Also known as: antenatal varicella virus infection; mother-to-child transmission of varicella syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Congenital varicella syndromeGARD ID 45 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Congenital varicella syndrome.

Explore the Congenital varicella syndrome blog

Explore research for Congenital varicella syndrome

Explore actively recruiting Congenital varicella syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Congenital varicella syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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