In amniocentesis, a needle is inserted into the amniotic sac the fluid-filled sac that surrounds and protects your baby and a small amount of fluid is withdrawn. This fluid contains fetal cells and proteins that can tell your provider how your baby's doing, and how his organs are developing, as well as if there's any genetic abnormality or disease. An amniocentesis, if performed, is usually done between the 16th and 18th weeks of pregnancy. Your provider may order one if you're over 35 women over 35 are at a greater risk for having a child with Down syndrome or if you've had a child with a genetic disorder. Because there is a chance for the procedure to cause amniotic fluid to leak, you'll want to talk with your provider about the risks involved.
High levels can mean a neural tube defect like spina bifida.
Performed between the 16th and 18th weeks of pregnancy, this is only a screening test. An abnormal result would require more testing to determine if there's really a problem. These villi can give a good representation of the developing fetus, and detect disorders like Down syndrome, cystic fibrosis, and others. Again, because there's some increased risk of miscarriage, you'll want to thoroughly discuss CVS with your provider if the test is suggested for you. Before you consider ending a pregnancy or taking any other action, it's important that you talk with your provider about the testing how it was completed and evaluated and seek a second opinion if needed.