5 doctors weighed in:
What are the leading causes of severe or profound mental retardation?
5 doctors weighed in

Dr. Glen Elliott
Pediatrics - Psychiatry
3 doctors agree
In brief: Genetics and injury
The most serious forms of mr typically have genetic causes are result for intrauterine trauma ( e.
g., viral infections) or head injury after birth. Many syndromes have been identified that are associated with these levels of severity, but most remain undetermined.

In brief: Genetics and injury
The most serious forms of mr typically have genetic causes are result for intrauterine trauma ( e.
g., viral infections) or head injury after birth. Many syndromes have been identified that are associated with these levels of severity, but most remain undetermined.
Dr. Glen Elliott
Dr. Glen Elliott
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Dr. Johanna Fricke
Pediatrics - Developmental & Behavioral
In brief: Genetic & biological
Down syndrome, fragile x, and fetal alcohol spectrum disorders together, about a third.
A cause is found in 75% of cases; of those, a genetic cause of is found in over 66%. Infections, substance abuse and other pregnancy problems, about 10%. Bleeding, pre-eclampsia, placental damage and labor/delivery problems, < 10%. 5% after birth (e.G, traumatic brain injury, meningitis).

In brief: Genetic & biological
Down syndrome, fragile x, and fetal alcohol spectrum disorders together, about a third.
A cause is found in 75% of cases; of those, a genetic cause of is found in over 66%. Infections, substance abuse and other pregnancy problems, about 10%. Bleeding, pre-eclampsia, placental damage and labor/delivery problems, < 10%. 5% after birth (e.G, traumatic brain injury, meningitis).
Dr. Johanna Fricke
Dr. Johanna Fricke
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