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智力低下是儿科常见病,其发病率英国为8‰、日本6.6‰,我国苏州市、上海市分别为1.48‰、1.74‰。轻度患者能从事简单的劳动,学习上可达到初小水平,生活可自理;中度患者发育迟缓,表达能力很差,运动不协调,经训练后生活可自理;重度患者则生活不能自理,有严重的运动和感觉障碍,终生要人照顾。专家认为,智力低下患者主要与遗传因素有关。据此,除禁止青年男女近亲结婚外,还应重视和加强孕妇产前诊断。如在怀孕6～8周以前取宫内绒
Mental retardation is a common pediatric disease, the incidence of the United Kingdom 8 ‰, Japan 6.6 ‰, China’s Suzhou City, Shanghai, respectively, 1.48 ‰, 1.74 ‰. Mild patients can engage in simple labor, learning can reach the level of early childhood, life can take care of themselves; Moderate patient growth retardation, poor expression, uncoordinated exercise after training can take care of themselves; patients with severe life can not take care of themselves, Serious motor and sensory disturbances, life-long attendance. Experts believe that patients with mental retardation mainly related to genetic factors. Accordingly, in addition to banning the marriage of young men and women of relatives, we should also attach importance to and strengthen the prenatal diagnosis of pregnant women. Take 6 to 8 weeks before pregnancy, uterine velvet