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Living with Autosomal recessive primary microcephaly

An inherited condition in which a baby is born with a very small head and brain.

Understanding Autosomal recessive primary microcephaly

Autosomal recessive primary microcephaly (MCPH) is a condition in which babies are born with a very small head and a small brain.

The head and brain keep growing but stay much smaller than usual. Intellectual disability is typically mild to moderate and does not get worse with age. Most people have delayed speech, and motor skills can be mildly delayed. Some have mild seizures, attention or behavior problems, or short height. It does not usually affect other organs.

Signs & symptoms

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

  • Abnormally small head (microcephaly)
  • Global developmental delay
  • Intellectual disability
  • Short stature
  • Sloping forehead
  • Brain structure differences seen on scans

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 brain and nervous system specialists, eye disease specialists and genetic specialists.

  3. Ask which tests can help

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

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Eye disease specialists (ophthalmologists); Genetic specialists (geneticists)
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
Can genetic testing find which gene is involved?
Which therapies can support speech and development?
Should my child be checked for seizures?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Recessive

Changes in genes (also called variants) cause this condition. It is autosomal recessive, so a child inherits a changed copy of a gene from each parent.

GeneticNeurological

Also known as: mcph; microcephalia vera; microcephaly vera; microcephaly, primary autosomal recessive; microcephaly, primary, autosomal recessive

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Autosomal recessive primary microcephalyGARD ID 12117 · 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 Autosomal recessive primary microcephaly.

Explore the Autosomal recessive primary microcephaly blog

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Explore actively recruiting Autosomal recessive primary microcephaly studies with HealthSpark.

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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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