Amniocentesis, also known as amniocentesis, is one of the prenatal tests used to screen for fetuses with chromosomal abnormalities such as Down syndrome. The chance of infection occurring at 20 days of amniocentesis is low, but it is still a risk of infection because it is an invasive procedure. The reason why amniocentesis can become infected is related to poor aseptic practice by the puncturer or inadequate sterilization of the puncture equipment, which ultimately leads to infection. In addition, when the puncture needle passes through the placenta, there may be blood seepage from the placenta, or due to factors such as fetal activity, there may be blood seepage from the puncture site, ultimately resulting in blood staining of the amniotic fluid. If the mother herself has an infectious disease, this also undoubtedly increases the risk of intrauterine amniotic fluid infection. If an infection occurs, the pregnant woman needs to go to the hospital immediately for relevant tests and hospitalization to prevent the infection from worsening, which may increase the risk to the mother and the fetus. Once in the hospital, it is usually necessary to identify the type of infection so that targeted anti-inflammatory treatment can be administered, keeping in mind that the use of medication needs to be done under the guidance of a doctor and not on your own. In addition, ultrasound, fetal heart monitoring and other tests are needed to assess whether the fetus in utero is affected by the infection and its growth is slowed or even stillborn. It is recommended that pregnant women eat light, easy-to-digest foods such as porridge and egg custard during the infection period, avoid eating meat and spicy foods, eat more fresh fruits and vegetables, pay attention to rest, keep a relaxed mood and actively accept treatment in order to recover as soon as possible.