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本文报道了1986～1991年我省医院的出生缺陷流行病学调查资料。神经管缺陷是最常见和严重的先天性畸形，其发生率为4．94‰。（738／149262），高于全国平均值（2．74‰）。本文讨论了我省神经管缺陷高发的可能病因。
This article reports the epidemiological investigation of birth defects in our province from 1986 to 1991. Neural tube defects are the most common and serious congenital anomalies with an incidence of 4.94 ‰. (738/149262), higher than the national average (2.74 ‰). This article discusses the high incidence of neural tube defects in our province may cause.