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根据12个污染监测点3年内的监测记录,把市区的14个地段划分为化学污染程度不同的3个地区,其中污染最重地区主要是交通干道和大工厂区;以综合污染指数最小的一区为对照区。根据分娩时的记录,共对150名(每个地区50人)年龄18～25岁的初产妇个人接触大气污染性质、妊娠经过、分娩时及新生儿的生长发育状况进行了调查。结果表明,随着大气污染的加重,新生儿的身长和体重也随之减小,Anrap均匀级数变小,胎盘-胎儿指数增大。胎盘的形态和比重分析结果都证明器官和细胞各项指标均有明显差异。胎盘、羊膜、脐带的重量随着地区大气污染的加剧而差别更加明显。有随脐带增长重量随之减小的适应代偿现象,增加了胎儿窒息或脐带绕颈的危险。胎盘的形态学特点,随着大气污染的加重胎盘的变性——营养不良过程加重,无血管。钙化、硬化、纤维化的绒毛增多,出现未成熟
According to the monitoring records of 12 pollution monitoring stations within 3 years, the 14 districts in the urban area are divided into 3 areas with different degrees of chemical pollution. Among them, the most polluted areas are mainly traffic trunk roads and large factory areas. With the smallest integrated pollution index A district as a control area. According to the records of birth, a total of 150 individuals (50 people in each region) of primiparae exposed to the age of 18 to 25 years were investigated for the nature of their exposure to air pollution, gestational age, childbirth and the growth and development of newborns. The results showed that with the increase of air pollution, the length and weight of neonates also decreased, the average number of Anrap became smaller and the placenta-fetus index increased. Placental morphology and specific gravity analysis of the results show that there are significant differences in the indicators of organs and cells. Placenta, amniotic membrane, the weight of the umbilical cord with regional air pollution aggravate more obvious differences. With the increase in the weight of the umbilical cord along with reduced adaptive compensatory phenomenon, an increase of fetal asphyxia or cord around the neck danger. The morphological characteristics of the placenta, as the air pollution aggravates placental degeneration - aggravating malnutrition, without blood vessels. Calcification, sclerosis, fibrosis of the villi increased, there is immature