[Polymerase chain reaction]

The PCR is a method for obtaining millions of copies of a specific DNA sequence in vitro. It appears that this method will lead to several developments in the diagnosis and treatment of many disorders. Especially in genetics and infectious diseases successful results have been achieved. Abnormal gene or infectious agents' genes which may be in less amount in clinical specimens can be amplified with this method. In this way PCR can provide enough genetic material for further diagnostic analysis.