Amniocentesis is an invasive procedure and all invasive procedures carry some risk. However, because the amniocentesis doctor performs the procedure under ultrasound, it is generally safer. Amniocentesis is generally performed under ultrasound guidance with a fine needle punctured into the amniotic cavity. By extracting the amniotic fluid from the pregnant woman, the shed cells or genetic material of the fetus are obtained for genetic diagnosis, and information about the health and development of the fetus, among other things, can be obtained. Bleeding of the pregnant woman and outflow of amniotic fluid may occur during the amniocentesis operation, and intrauterine infections may occur if the pregnant woman has various infections, etc. before the operation, or if she does not take care of herself after the operation. In addition, the operation may also affect the normal development of the fetus and lead to conditions such as preeclampsia. It is recommended that pregnant women who need to undergo amniocentesis should consult a doctor in a timely manner, and under the doctor’s guidance, complete the relevant examinations and take proper preparatory measures before undergoing the operation.