Women who are 41 years old can still have children, as long as they have normal periods and can ovulate normally. However, at the age of 41, the chance of having a malformed fetus is relatively high and the chance of pregnancy is low due to the decrease in ovarian function. There are a lot of tests to be carried out for the birth of a child. Eugenics tests and health checks such as blood pressure, blood sugar, infectious diseases and folic acid bioavailability tests should be carried out before conception. If there are no abnormalities in the tests, the female partner should take 0.8mg of folic acid orally once a day for 3 months before pregnancy and continue taking it for 3 months until pregnancy. The male partner should also undergo some tests to check his physical condition and sperm quality to ensure eugenics.