Research suggests there is a strong genetic component to OCD. The explanation at there is a genetic predisposition to OCD which is generational via reproduction.
Research found at first degree relatives of OCD sufferers has 11.7% chance of developing OCD, compared to 2.7% risk in first degree relatives of control participants without OCD
Candidate genes are genes identified as potentially causing a disease due to previous knowledge
The response of OCD patients to a particular drug therapy have led to suggestion that there are genes relating to serotonin and dopamine involved
There is the comt gene which produces the ending comt and therefore more dopamine
Genes involving transmission of serotonin across synapse has also been implicated in OCD
It is likely that OCD is polygenic and therefore several genes are involved
