Certain risk factors of OCD have been observed, although definite proof has not yet been established, like:
Depression: A clinically depressed person is at higher risk of having OCD.
Family history: People with OCD running in families are more susceptible to be affected.
Stressful life events: Any personal or family tragedy may sow seeds of OCD, especially in emotionally sensitive persons.
Postpartum stress: With a newborn come new responsibilities, new routines and many adjustments that may trigger emotional reactions in women. Fear of wellbeing of baby, recurrent thoughts of baby's safety and repeated need of reassurance fertilizes the ground for OCD.