Amniocentesis is performed under ultrasound guidance, and miscarriage due to amniocentesis is a small probability event. If miscarriage occurs after amniocentesis, it may be due to the following abnormalities: 1. Abnormal embryonic development: amniocentesis is a more commonly used prenatal diagnostic technique to obtain information about the health and development of the fetus by taking a specimen of the pregnant woman’s amniotic fluid, which is relatively safe in itself. If miscarriage occurs after amniocentesis, many are problems with the fetus itself, such as chromosomal abnormalities, which lead to the occurrence of miscarriage. At this time, even if amniocentesis is not performed, the fetus may also suffer from miscarriage, sterilization or even malformation, etc. The answer can be found through amniocentesis chromosome examination to prepare for future pregnancies; 2. Post-operative intrauterine infection: the pregnant woman before amniocentesis already has an infection, or post-operative Cleaning and hygiene are not standardized, and bacteria are brought into the amniotic cavity during the amniocentesis procedure, causing intrauterine infection, which can lead to miscarriage, and antibiotics can be used for anti-infection treatment; 3, premature surgery: the gestational week is less than 14 weeks, and there is not much amniotic fluid in the uterine cavity, so performing amniocentesis at this time will easily lead to too little amniotic fluid in the uterus, which in turn leads to miscarriage; 4, surgical stimulation: less likely, but not excluded The amniocentesis technology is now very mature, according to the current level of puncture, the probability of fetal miscarriage after surgery is very low; 5, other: such as mood swings, abdominal pressure and other reasons, there is also a certain possibility of causing miscarriage after amniocentesis, but the probability is very small. If there is a miscarriage after amniocentesis, you must pay attention to post-abortion maintenance, pay attention to rest, and use antibiotics for patients with signs of infection. It is important not to have sexual intercourse before menstruation, and not to take any kind of bath or vaginal douche for 1 month.