The present status in this article, the genetics of obsessive compulsive disorder (OCD) is discussed (OCD). Heredity has a key role in the development of OCD. This information is derived from a range of investigations, involving family, double, and segregate studies conducted. A large single gene influence as well as a genetically determined explanation have been postulated based on segregation research. In addition, molecular genetic associations and connection studies have uncovered a number of fascinating genes and genomic areas that may play a role in OCD. As a consequence of the gene search, classifications of the OCD phenotype have emerged, and some of them may be considered intermediate morphologies between it gene influence and the OCD–DSM-IV diagnosis. Finding susceptibility genes is made more challenging by the clinical and genetic diversity of OCD; nonetheless, pinpointing vulnerability genes will aid in the identification of subgroups or considerations of the condition. As a consequence, research strategies that employ clinical subtyping to characterize the OCD presentation in the perspective the genetic studies might potentially aid in the diagnosis and etiology of OCD. In OCD, the relationship involving genetic and environmental is poorly known. However, there have been a lot of publications that have attempted to determine how the environment affects OCD will be addressed.