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dracodraconisDad's Age May Lower Junior's IQ - ABC News
A study of the intelligence of 33,000 children at 8 months, 4 years, and 7 years between 1959 and 1965 seems to indicate the optimum is an older mother with a younger father. In fact, older fathers correlated well with lower intelligence scores. Other researchers, however, are sceptical of results, stating that the type of parental care given by men at that time might have had as much or more of an effect than age.