Is the test screening chromosome abnormalities of the fetus or screening Down syndrome form mother’s blood which will not affect the fetus and safe for both mother and child. An accuracy is 99.1%

Which chromosome can be screened for NIPT Test?
Currently, can be screen for trisomy abnormalities all 23 chromosome but basically, Screening for abnormalities in chromosomes trisomy group 13 (Patau syndrome), 18 (Edwards syndrome), 21(Down syndrome) and abnormality of sex chromosome (X, Y)