Fetal chromosome 18 trisomy:Imp:Pt:Plas.cfDNA:Ord:Dosage of chromosome specific cf DNA
fetal chromosome 18 trisomy:imp:pt:plas.cfdna:ord:dosage of chromosome specific cf dna
Fet Chr 18 Ts Plas.cfDNA Ql
fet chr 18 ts plas.cfdna ql