Which of the following is false regarding cell free DNA
Prenatal diagnosis can be made by invasive and non invasive techniques.
Invasive techniques include aminocentesis, chorionic villous sampling, cord blood sampling. Cell free DNA is a non invasive method.
Detected in maternal blood
Prenatal diagnosis of Down's syndrome can be made
Used for liquid biopsy
It is one of the invasive techniques for  prenatal diagnosis of certain genetic diseases