TWO STAGE ENRICHMENT OF CELL-FREE FETAL DNA IN MATERNAL PLASMA.

摘要

The present invention provides methods for enriching fetal nucleic acid in a biological sample from a maternal host. Also provided are methods for detecting the presence or absence of markers in fetal, tumor, or neoplastic nucleic acid. The methods can include treating the biological sample with DNase and, optionally, performing whole genome amplification on the treated samples. The biological sample can be, for example, a blood sample.