What is amniocentesis?
Amniocentesis, sometimes referred to as an 'amnio' is a medical procedure used in the prenatal diagnosis of chromosomal abnormalities. The procedure involves taking a small amount of amniotic fluid, which contains fetal tissues, from the amniotic sac surrounding a developing fetus. The fetal DNA is then examined for genetic abnormalities. Amniocentesis is what is termed an invasive diagnostic procedure and carries a risk of miscarriage, estimated at between 1-2%.