What is the life expectancy of someone with Anencephaly?

Anencephaly is a severe neural tube defect that is unfortunately always fatal, with most infants passing away shortly after birth or being stillborn. While some rare cases have seen infants survive for a few days or, exceptionally, longer, there is currently no medical treatment to reverse the condition or extend life beyond these very limited timeframes.

What is the prognosis for a diagnosis of Anencephaly?

The diagnosis of Anencephaly is emotionally devastating for any family. Because Anencephaly involves the absence of major portions of the brain and skull, vital functions cannot be sustained independently for any significant duration. Most pregnancies affected by Anencephaly result in stillbirth or neonatal death within hours or days of delivery. While medical literature documents extremely rare instances of survival lasting months or years, these cases are clinical outliers and do not reflect the standard progression of the condition.

What factors influence the short life span of infants with Anencephaly?

The severity of Anencephaly is primarily determined by the extent of the neural tube closure failure. Because the brain tissue required for autonomic processes—such as consistent, stable breathing and heart rate regulation—is missing or severely underdeveloped, the body cannot maintain homeostasis. Factors impacting the immediate post-birth period include:

• The extent of the cranial vault defect.


• The presence of associated spinal cord abnormalities (often seen in neural tube defects).


• The infant's ability to maintain spontaneous, regular breathing patterns.


• Supportive care decisions made by the family in consultation with palliative care teams.

How can families approach quality of life and care?

When facing Anencephaly, the focus of medical care shifts from curative treatment to compassionate, comfort-focused care. Longevity is not the primary measure of the life of an infant with Anencephaly; rather, the focus is on dignity, comfort, and the opportunity for parents to hold and connect with their child. Palliative care specialists are essential in ensuring that the infant is kept comfortable, pain-free, and surrounded by their family during their short time.

Next steps

• Consult with a genetic counselor to discuss recurrence risks for future pregnancies.


• Connect with the 31 members on DiseaseMaps.org who have navigated this journey to find peer support.


• Work with a perinatal palliative care team to create a birth plan that prioritizes your goals for your baby’s comfort.


• Seek bereavement counseling to support your emotional health during and after the pregnancy.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Anencephaly Overview.


• Orphanet: Neural tube defects and Anencephaly data.


• Centers for Disease Control and Prevention (CDC): Facts about Anencephaly.


• OMIM (Online Mendelian Inheritance in Man): Clinical summary of neural tube closure defects.