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thyroxine
Cretinism is the condition that results from insufficient iodine in children.
Cretinism is a condition of hypothyroidism during fetal life, infancy, and childhood. Characteristics include both severe stunted body growth and mental retardation. It is caused by a deficiency of Iodine, lack of a thyroid gland, or inability of the thyroid gland to produce enough hormones that are crucial to the development of a child. Cretinism can be prevented in one way by adding iodine into the persons diet.
Overstudy does not cause mental retardation.
Hypothyroidism. (or congenital hypothyroidism)
TThere are quite high as it comes in different types of mental retardation.
Exposure to lead can also cause mental retardation.
literature review on mental retardation with reference
The term "mental retardation" is generally considered outdated and offensive. People with intellectual disabilities may have a shorter life expectancy due to health complications or co-occurring conditions, but it is not accurate to say that a specific number of people die specifically from having an intellectual disability. It is important to focus on providing proper support and healthcare to improve the quality of life and longevity for individuals with intellectual disabilities.
Mental retardation has different levels. There is Mild intellectual disability; moderate intellectual disability; severe intellectual disability; and Profound intellectual disability.https://www.floridahospital.com/mental-retardation-mr/symptoms-and-signs-mental-retardation
The two conditions are not at all related. Autism does not cause mental retardation.
because some ppl are born with birth defects like mental retardation