The stillbirth proportion was 69.3% over all index NTD cases, 95.4% in anencephaly cases, 43.7% in spina bifida, and 62.6% in encephalocele cases.

• 在所有神经管畸形病例中 ；无脑儿和脊柱裂占的比例较高 ；分别为 4 4.；3%25和 4 1