Test results expressed as numbers
1) In molecular diagnostics, a process by which multiple copies of genetic material (RNA, DNA) are generated so as to produce adequate levels of the target to be detected or quantitated 2) The process by which the signal from a detection system is increased so as to improve detection or quantitation of an analyte of interest, such as genes or drugs...
Were you looking instead for information on the hCG test used in certain cancers? If so, see the article hCG Tumor Marker .