Prenatal diagnosis in complete safety with transabdominal amniocentesis is a procedure that involves the removal of amniotic fluid directly through the uterine cavity. In case of pregnancy, amniocentesis is one of the most precious allies in understanding the state of health of the fetus. Amniocentesis is generally performed twice during the nine months of gestation: between the 16th and the 18th week it is defined as early and from the 25th week it is defined as late. It analyzes the actual state of health and maturity of the unborn child.