Amniocentesis, cordocentesis and chorionic villus puncture surgery is a safe and simple minor surgery without obvious pain, no need to worry too much; it is under ultrasound guidance, through the abdominal wall of the pregnant woman puncture collection of amniotic fluid, umbilical cord blood or chorionic villus, can be diagnosed before the birth of the fetus with chromosomal disorders, thalassemia, intrauterine pathogens infections, etc., after many years of clinical application, has been proved to be safe and effective; booking the surgery before the pregnant woman with All the examination information during pregnancy. Preoperative precautions: 1, pregnant women accompanied by their families around 8 o’clock in the morning registration and with this list in the nurse’s triage desk report, measure the temperature, blood pressure. Wait outside the surgery, to be named into the surgical buffer room to change shoes ready for surgery. 2, must eat a full breakfast before surgery, such as surgery time later with snacks for preoperative, postoperative eating. 3, three days before the operation is prohibited coitus, the day before the operation, please shower, before the operation, please urinate. 4.If you have a cold, fever, abdominal pain, abdominal distension, vaginal fluid, bleeding, etc. 3-7 days before the operation, please inform the doctor before the operation. Postoperative precautions: 1. Press the abdominal needle opening firmly with the palm of your hand for about half an hour after the operation. 2.Rest for more than half an hour after the operation before leaving the hospital; foreign patients had better stay in the city that night. 3.Pay attention to rest after the operation, less activity, do not do physical labor, do not bathe within 24 hours, prohibit sexual life for 1 month. 4.Family members should wait outside the door of the surgical buffer room at any time when the umbilical cord blood is drawn, so that the umbilical cord blood can be sent to the outpatient laboratory on the 2nd floor for testing, and the results can be taken to the nurses after 20 minutes, and then taken back to the outpatient clinic together with the patient’s medical record. 5.Please inform the doctor in time if there are any discomforts such as dizziness, dizziness, cold sweat and choking during and after the operation, and please contact the doctor if there are any symptoms such as abdominal pain, abdominal distension, vaginal water, bleeding, fever, and obvious decrease or disappearance of fetal movement after the operation. 6.Pregnant women fail to come to the surgery as scheduled, please inform the doctor by phone. If you do not inform the doctor in more than 2 weeks and do not take the medical record, the medical record information will be handled by the hospital itself. 7.When you need to take samples again because of the failure of the cell culture, you need to pay for the puncture fee and the fee for the cell culture, and you will no longer be charged the fee for chromosome analysis. 8.Amniotic fluid and chorionic villus report can be taken 1 month after operation, and cord blood report can be taken 14 days after operation. The report can be obtained at the nurse’s desk of the Genetic Clinic by presenting the outpatient medical record. Couples will be notified promptly if abnormal prenatal diagnosis results are found.