Method for obtaining the fetal cells derived chromosome dna

A In provides The present invention of a method of obtaining fetal cells derived chromosome DNA from maternal blood sample, a. A fraction obtained from maternal blood sample enriched fraction A nucleated red blood complete blood based, specifically labeled with respect to red blood cells and nucleic acids. b. Labeled fractions blood cells in A by selecting the least cell sorting to obtain the purity of nucleated red blood cells is increased fraction B. The blood cells in the fractions B with separating each one cellular level, for each of the separated blood cells, independently by performing the extraction process of the chromosomal DNA, each containing distinct chromosomal DNA in one cell level to obtain a fraction C to. d. By performing molecular biological analysis on each fraction from C, the group of the fractions C, and selecting a fraction D containing chromosomal DNA from the fetus. .FIELD 1