Epidurals + Postpartum Depression

I recently read some research showing that women who delivered without an epidural were more likely to have postpartum depression. I wanted to compare that study with Glow Mom’s experiences. I was interested in a natural birth, but I have a family history of depression and do not want to put myself at risk developing postpartum depression. It is something I am concerned about. Did you have an epidural or go natural? Did you experience some postpartum depression?