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随着医疗卫生事业的发展,流行病及传染病已显著减少,但由于工农业的迅速发展,新的化学物质成千上万地涌现;原子能和放射性同位素的普遍应用;环境污染日趋严重等因素的影响,遗传性疾病及先天性畸形相对地、逐渐地增多起来.1986～1987年全国29个省、市对945所县以上医院进行了1243284例住院分娩围产儿的出生缺陷监测,发现出生缺陷儿16172例,发生率为13.01‰,最高发省份可达20.6‰,其中以神经管缺陷占首位,共3404例,占全部缺陷儿的21.0%.全国神经管缺陷发生率为2.74‰,最高发省份可达10.55‰,华北、东北及西北发病率均高于全国总平均率,平均率为7‰,若按全国一年出生一千二百万
With the development of medical and health undertakings, epidemics and infectious diseases have been significantly reduced. However, due to the rapid development of industry and agriculture, thousands of new chemical substances have emerged; the widespread application of atomic energy and radioisotopes; the worsening of environmental pollution and other factors Of the genetic diseases and congenital malformations relatively increased gradually.From 1986 to 1987 in 29 provinces and cities across the country to 945 counties and hospitals were 1243284 birth defects in hospital delivery childbirth monitoring and found that birth defects Children with 16,172 cases, the incidence rate was 13.01 ‰, the highest incidence of up to 20.6 ‰ provinces, of which the top of the neural tube defects, a total of 3404 cases, accounting for 21.0% of all children with defects .National incidence of neural tube defects was 2.74 ‰, the highest Province up to 10.55 ‰, North China, Northeast and Northwest incidence rates were higher than the national average, the average rate of 7 ‰, if the country was born 12 million a year