1. Can genetic testing directly predict whether the offspring will develop the disease? No. It is possible to predict directly whether the offspring will carry the disease causing gene. If there is a clear history of ALS in the family, genetic testing can predict whether the offspring will also carry the gene that causes the disease. However, it is not possible to predict directly whether the offspring will develop the disease due to the genetic type and epigenetic rate. 2. Can a pregnant woman with a family history of ALS be tested by prenatal genetic testing to determine the possibility of inheritance? Pregnant women with a family history of ALS who want to know if their offspring will inherit the disease can be screened through prenatal testing. The first is that the offspring may not carry the disease causing gene, which is the ideal situation and means that ALS will stop in this generation. The second is that the offspring may be found to carry the gene, and there are two possibilities: one is that they carry the gene and have a high ectopic rate and will develop the disease; the other is that they carry the gene but have a low ectopic rate and may not develop the disease by the time they reach the age of general onset. However, since there is no way to predict whether the disease will develop in 30 or even 50 years, it is important to take measures to minimize the risk of the disease in the next generation if the relevant gene is detected. The method of prenatal diagnosis of ALS is the same as that of prenatal testing for other genetic diseases, i.e., the fetus is tested for the relevant genes by taking the chorionic villus or amniotic fluid after pregnancy to see if any mutation has occurred. 3. Can IVF intervention be done? Although the technology of IVF is more mature nowadays, it still takes some time to implement the intervention for ALS. The main reason why IVF is not yet available for this disease is that ALS itself is very rare and the number of genes that can be detected is relatively small.