20世纪70年代我国确定了控制人口增长、提高人口素质的人口政策。预防出生缺陷,提高出生人口素质成为一项长期而艰巨的任务。世界范围内,每年有790万严重缺陷儿出生,约占出生总人口的6%,其中60%在贫穷国家,34%在中等收入国家,只有6%在富裕国家。在我国,出生缺陷是l岁 In the 1970s, our country set a population policy to control population growth and improve population quality. To prevent birth defects and improve the quality of the population born has become a long-term and arduous task. Globally, 7.9 million serious defects occur every year, accounting for about 6% of the total population born, 60% of whom are in poor countries, 34% in middle-income countries and only 6% in rich countries. In our country, birth defects are l years old