一、父母血缘远近父母均为本地人,其子女平均智商为102.45,父母为同省异地人,子女平均智商为106.19,父母为异省者高达109.35;而弱智儿的发生率以及弱智程度恰相反,以本地人结婚的家庭最高。二、母亲生育年龄大小母亲在23岁以前所生的子女的平均智商为103,而在24-28岁生的高达109.29,29岁以上生的又低于105。因此,可以认为24-28岁是最佳生育期。 First, the parents of blood and distance Parents are natives, their children, the average IQ of 102.45, parents with different provinces of the same province, the average IQ of children was 106.19, parents as different from up to 109.35; and the incidence of mentally retarded children and mentally retarded degree on the contrary, Highest number of families marrying locals. Second, the mother of childbearing age The average age at birth of mothers born children before the age of 103 was 103, while in the 24-28 year-old up to 109.29, 29-year-old and below 105. Therefore, 24-28 years old can be considered the best growth period.