<unk>  (cffDNA) is<unk> <unk>  that circulates<unk> ly in the maternal blood. Maternal blood is sampled by venipuncture. Analysis of cffDNA is a method of non-invasive prenatal diagnosis frequently ordered for pregnant women of advanced maternal age. Two hours after delivery, cffDNA is no longer detectable in maternal blood.
Cell-free fetal DNA
Human milk microbiome
Circulating mitochondrial DNA
Genetically modified virus
Reporter virus particles
Placental microbiome
Immature ovum
Products of conception