When is amniocentesis necessary? The indications for amniocentesis are many and complex. In general, amniocentesis can be considered for fetal chromosomal abnormalities and intrauterine infection with TORCH. Can amniocentesis be performed for a low placenta? If the risk of fetal abnormality is greater than the risk of low placenta, then amniocentesis should be performed. If the risk is not high, you can consider performing non-invasive DNA instead. When is the best time to perform amniocentesis? The time window for amniocentesis depends on your test. For aneuploidy testing, 16-22 weeks is the best time, some hospitals can extend it to 24 weeks, and for suspected TORCH infection, any time after 20 weeks is usually fine. Are amniocentesis test results accurate? The accuracy rate of amniocentesis for fetal aneuploidy screening is 100% according to the Ministry of Health. I am sure the medical staff will communicate with you if there are any abnormal results. What are the risks of amniocentesis for the mother and the fetus? The risk of amniocentesis is very small. Generally speaking, there is a 3-5% risk of miscarriage. If you think there is a risk of miscarriage, you can basically rest assured because even without amniocentesis, a normal pregnant woman will have a 3% risk of miscarriage at this gestational week. In reality, many pregnant mothers have heard that some pregnant women have miscarried after having amniocentesis. In fact, the vast majority of these miscarriages are due to fetal chromosomal abnormalities, and most of the pregnant mothers who have amniocentesis are those whose fetuses have abnormalities. For a normal fetus, amniocentesis will not lead to miscarriage. As for other risks such as infection and fetal death, they can be ignored. What abnormalities can be detected by amniocentesis? To be precise, amniocentesis mainly focuses on fetal chromosomal abnormalities and infections, as well as the examination of fetal rod and kidney function or lung maturation, while the exclusion of fetal abnormalities mainly relies on imaging. Of course, most fetuses with chromosomal abnormalities will have malformations. Do I need to be hospitalized for amniocentesis? How long is the hospital stay? Amniocentesis does not require hospitalization. You can go home and rest after 1-2 hours of observation in the outpatient clinic.