How much does an amniotic fluid test cost depends on what the amniotic fluid test is about, nowadays the main purpose of amniotic fluid testing is to find out if there are any chromosomal abnormalities in the baby, the chromosomal test is now divided into general and more detailed ones. The common chromosome test is to do karyotype analysis of the amniotic fluid cells after taking the amniotic fluid, the cost of the test is about 2500 yuan. Further detailed tests, which can check for genetic fragments at a deeper level, will cost about$5,000-6,000. It depends on the individual and what tests need to be done to determine what the cost will probably be. Amniotic fluid testing is best done between 18-24 weeks of pregnancy. This is because at this time, the amount of fetal cells in the amniotic fluid is higher and the success rate of having an amniotic fluid test is higher.