University of Queensland, Australia of 33,437 in 1959 to 1965 between the United States-born children were analyzed, and to allow every child in their 8-month-old, 4-year-old and 7-year-old when they accept a series of cognitive function testing.
Fellows will be at home, such as income and parental level of education and other socio-economic factors are taken into account found that the elderly father of the child at the poor performance of intelligence tests, but the elderly mother of the child at testing memory, learning and concentration Tests, however, the higher scores.
Experts believe that this is because with age, male sperm will produce genetic variation, which led to a series of child health problems, including birth defects and and mental illness, such as schizophrenia, autism and bipolar disorders.
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