Cell-free   fetal DNA (cffDNA) sex determination is a non-invasive method used to determine the sex of a fetus by analyzing  the  fetal  DNA   present   in   the mother's   blood.   The   cffDNA   circulates   in    the maternal bloodstream during   pregnancy,   typically after the 7th week. By detecting the    presence    of Y-chromosome  material in the blood, it can confirm a male fetus, as females lack a Y chromosome. This test offers  a   reliable   and   early   option   for   sex determination compared to traditional  methods  like ultrasound. It is  often   used   in   conjunction   with  non-invasive  prenatal  testing  (NIPT)  for screening genetic conditions. The test is highly accurate,  with a very low risk of false  results. It  poses  no  risk  to the  fetus  and  is  considered  a  safe  alternative  to invasive procedures.