A New study found that homocysteine and MTHFR (a gene involved in folic acid metabolism) are risk factors in developing Down Syndrome. We discussed both of these in our lecture on improving ovarian reserve and how to reduce homocysteine and improve folate metabolism. The standard treatment is simply to take B6, B12 and folic acid, but the type of B6, B12 and folate are important. These are also important to prevent your own cardiovascular risk factors, so if you are trying to get pregnant, its very worthwhile to get these checked.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 2007 Oct;24(5):533-7.