42 years old belongs to the high age of pregnant women, high age pregnant women relative to normal women of childbearing age fetal malformation rate is relatively high, but there are differences between individuals, and can not determine the specific malformation rate. 42 year old pregnant women of advanced age fetal chromosomal abnormalities are more likely, the chance of fetal genetic disease is also higher, the chance of fetal malformation is higher, but each woman’s physical condition is different, the chance of fetal malformation how much can not be determined. If a 42-year-old pregnant woman continues her pregnancy, she should usually do a good job of maternity checkups during pregnancy, such as NT checkups and four-dimensional ultrasound, etc. It is necessary to follow the doctor’s instructions to do amniocentesis to determine whether the fetus has chromosomal abnormalities, and if the results of the checkups are abnormal, it is necessary to carefully consider whether to continue the pregnancy. It is recommended that women get pregnant and have children during their childbearing years, as the chances of pregnancy complications are higher at age 42, and the chances of a difficult labor are also higher, which is not good for the pregnant woman herself or the fetus.