1. Anencephaly is absence of the fetal cranial vault.

2. The top five birth defects were: spina bifida, anencephaly, congenital hydrocephaly, cleft lip with cleft palate, and encephalocele.

3. The absence of the fetal cranial vault in anencephaly is shown here.

4. The absence of the fetal cranial vault anencephaly is shown here.

5. Objective:To describe the sex difference of anencephaly in China. Methods:From 1987 to 1992, hospital-based cluster sampling method was adopted for collecting data.

6. Results There are 96 neural malformation with more common hydrocephalus, anencephaly, exencephaly and spina bifida in all malformations of 359 cases, hvaccounting for 26.7%.

7. Folic acid, a type of vitamin B, has been shown to reduce neural tube birth defects, such as spina bifida or anencephaly.

8. Women with BMIs of 30 or greater were 60 percent more likely to have a child with anencephaly and 40 percent more likely to have a baby with spina bifida than their slimmer peers.

9. The concentrations of the free amino acids in the amniotic fluid of the anencephaly fetus were raised markedly whilst those of the spina bifida fetus were lower than normal.

10. Purpose:To discuss the structural difference of liver between the anencephaly fetus and the normal fetus,[/anencephaly.html] and to supply the morphological date for the study of liver development in malformation fetus.

11. But babies born to mothers who said that they had gained weight around their waists rather than their hips were 2.4 times as likely to have anencephaly and at 1.8 fold greater risk of spina bifida.

12. Daily supplementation with folic acid for 1 month prior to conception and during pregnancy may reduce the incidence of neural tube defects such as spina bifida and anencephaly in the child.

13. The most common neural tube defects are spina bifida, in which the spin al cord fails to close completely during fetal development, and anencephaly, in which part or all of the brain doesn't develop.

14. Deficiencies can lead to defects like spina bifida, where part of the spine grows outside the body, and anencephaly, a fatal condition in which much of the brain fails to develop.

15. Results There are 96 neural malformation with more common hydrocephalus anencephaly exencephaly and spina bifida in all malformations of 359 cases accounting for 26.7%.

16. The highest of neural tube defects is spina bifida, then is anencephaly encephalocele, and so on.