Objective To explore the epidemiological characteristics of neural tube defects(NTDs)in Shunyi district from 2006 to 2012. Method Data from Shunyi district's birth defects monitoring network were used to describe the prevalence and the trends of NTDs. Results The prevalence of NTDs was 12.6/104.The prevalence rates of anencephaly,spina bifida,and encephalocele were 6.7/104,4.9/104 and 1.0/104,respectively.The change tendency of overall prevalence rates of NTDs were not statistical significantly,while the pr...