Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sources of cell-free DNA (cfDNA).
cfDNA is released by all tissues of the body including during normal function, but also by sources with differential or abnormal function such as gut flora or cancer (blue lines). cfDNA is usually understood to be in the plasma, but can also be found in other bodily fluids such as the bile, feces, and urine.
