[kabumpo]

No, and I don’t believe that there are for psychopaths either. People don’t realize thsat the brain and body change. The markers are there later, not at birth.

[hennie pennie]

Lots of research going to into this; personally, I believe that the propensity to become a psychopath is inborn; but I have no opinion with Narcissistic Personality Disorder --- so many characteristics therein resemble an array of armored defense mechanisms.

Genetic effects explain the stability of psychopat... [J Abnorm Psychol. 2008] - PubMed --------------------------------------------------------- http://www.ncbi.nlm.nih.gov/pubmed/18729612

Destined as a psychopath? Experts seek clues - Mental health- msnbc.com --------------------------------------------------------- http://www.msnbc.msn.com/id/30267075/ns/health-mental_health/page/2/

Ochberg believes that genetics plays a strong role in the development of psychopathy, and that environmental influences are much less important. "I believe the building blocks of psychopathy are largely inherited," he says,"and by 5 or 6 you either put together a normal conscience, a superego, or you don't."