And the prevalence rate of anencephaly,spina bifida and encephalocele were 19.19 per 10 000,28.67 per 10 000and 7.95 per 10 000 respectively.

• 围产儿NTDs总发生率为49.；77/万；其中无脑、脊柱裂和脑膨出的发生率分别为19