精神发育迟滞(MR)是一组病因复杂、治疗困难、严重影响患者身心健康的疾病,同时给社会和家庭带来沉重负担。我们对100例MR患者的临床观察和治疗,总结以下几点:①发病年龄:0～3岁占46％,4～7岁和8～15岁各26％,16～19岁仅占2％;除一定数量是先天性疾病外,围产期疾病和产后感染等直接威胁着婴幼儿智力发育 Mental retardation (MR) is a group of diseases with complicated etiology, difficult treatment and serious impact on the patients’ physical and mental health, while bringing heavy burden to society and families. We have 100 cases of MR patients with clinical observation and treatment, summed up the following points: ① age of onset: 0 to 3 years 46%, 4 to 7 years old and 8 to 15 years of age 26%, 16 to 19 years old only 2% ; In addition to a certain number of congenital diseases, perinatal diseases and postpartum infections directly threaten the mental development of infants and young children