Amniocentosis is a medical procedure used in preanatal diagnosis of chromosomal abnormalities and fetal infections , in which a small amount of amniotic fluid, which contains fetal tissues, is extracted from the amnion or amniotic sac surrounding a developing fetus, and the fetal DNA is examined for genetic abnormalities.
Early in pregnancy, used for diagnosis of chromosomal problems:
Later on, it also can be used to find problems such as: