Green, leafy vegetables, fruits and nuts naturally contain folate, a B vitamin that helps the body make healthy new cells. Most pre-natal vitamins include folic acid because it protects against defects in the formation of the neural tube, the precursor to the central nervous system.
Dr. Pal Suren is with the Norwegian Institute of Public Health:
“The neural tube is the origin of the human brain in the fetus and closes very early in development, and the neural tube defect is when this tube doesn’t close properly," said Suren.
Neural tube defects include spina bifida, a defect of the spine, as well as some brain defects. Since taking folic acid supplements before or right after becoming pregnant prevents these defects, Dr. Suren and his colleagues wanted to find out if the supplements could also prevent autism. They asked thousands of pregnant women to record all dietary supplements they took. After the children were born, the researchers reviewed the rate of autism.
“We went back to the data we had from early pregnancy and compared those mothers who had taken folic acid to those who hadn’t taken any folic acid," he said.
1.folic acid [生化] 叶酸，维生素B
Iron, folic acid and protein are also important at this stage of development.
2.childbearing n. 分娩；生子
The first generation under-child policy has reached the age of childbearing.
3.autism n. [心理][内科] 孤独症；自我中心主义
Einstein and Newton may have had a form of autism.
4.defect n. 缺点，缺陷；不足之处
The defect detracts greatly from the value of the vase.