What is the leading known cause of mental retardation?

Question

Quizplus · Accepted Answer

Problems in embryonic development, such as teratogen exposure or genetic disorders, are the leading known cause of mental retardation. These issues can affect the growth and development of the fetal brain, leading to cognitive impairment. Poor nutrition and environmental influences can contribute to cognitive deficits, but they are not considered the leading cause of mental retardation. Birth trauma can also have an impact on cognitive development, but it is not considered the leading cause of mental retardation.

What Is the Leading Known Cause of Mental Retardation