• 阴道出血 - 引用次数：7

  The influential factors on IQ were: mother’s age in pregnancy, mother’s educational levels, expenses on books yearly for children, vagina bleeding during first trimester gestation, interval of infants’ first cry after delivery, infants’ head stability at age four months.

  影响儿童智力因素：怀孕时母亲的年龄、母亲文化程度、年购买儿童课外书籍花费、孕早期母亲阴道出血情况、新生儿第一声啼哭距分娩时间、婴儿4月时头能否竖直等。

  参考来源 - 行为问题儿童智力特征及其相关因素研究

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