当前影响出生人口素质的主要因素之一是出生缺陷。国际上对出生缺陷的研究始于２０世纪６０年代初期，一些发达国家相继对出生缺陷采取监测手段，期待找出可进行干预的途径。１９８６年我国成立“中国出生缺陷监测中心”，并在全国范围内开始出生缺陷监测。１北京市出生缺... One of the main factors affecting the quality of the birth population at present is birth defects. The international study of birth defects began in the early 1960s. Some developed countries have adopted surveillance methods for birth defects one after another, expecting to find ways to intervene. In 1986, China established the “Birth Defect Monitoring Center in China” and started to monitor birth defects throughout the country. 1 Beijing born missing ...