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为了探索我市出生缺陷发生原因及相关因素，降低其发生率。１９９７年我们在全市开展了出生缺陷监测，共发现出生缺陷１５６例。１ 对象与方法１．１ 对象 １９９７年１月１日～１２月３１日在渭南市１１个县（市）医院和妇幼保健院分娩的围产儿。１．２ 方法 使用全国统?
In order to explore the causes of birth defects in our city and related factors, reduce their incidence. In 1997 we conducted a birth defect monitoring in the city, found a total of 156 cases of birth defects. 1 objects and methods 1.1 object January 1, 1997 to December 31 in Weinan City, 11 counties (cities) hospitals and MCH delivery of perinatal children. 1.2 method using the national system?