The Folic Acid Test TT gene cannot be changed. Folic acid gene TT is a kind of test result of MTHFR gene test, which is to detect the folic acid metabolism in the body. The test result can be categorized into three types, such as CC type, CT type and TT type. If it is CC type, it mostly indicates that the enzyme activity required in the metabolism process in the body is good, which is a normal result. However, if it belongs to TT type, it is a serious disorder of folic acid metabolism, which is a gene expression type that cannot be changed. If a pregnant woman is tested for folic acid gene TT during pregnancy, she needs to take folic acid supplementation under the guidance of her doctor, which can be done by taking oral folic acid tablets. type TT takes folic acid tablets throughout the entire pregnancy so that it is enough for the fetus. Patients with folic acid gene TT need to go to regular hospitals and cooperate with doctors to take treatment measures.