The NIPT test is designed to analyze the abnormal numbers of chromosomes or chromosomal bodies of the fetus after 10 weeks of pregnancy by a sample of the mother's blood. Chromosomes 21, 18 and 13 are examined, in addition to the chromosomes responsible for determining the sex of the fetus and related genetic syndromes XO, XXX, XXY and XYY. This screening test does not detect aneuploidy in chromosomes other than those mentioned above and therefore abnormalities in these chromosomes cannot be ruled out.