http://www.emedicinehealth.com/depression/page2_em.htm

helth depression and bipolar disorder genetic engineering

Yes, they are the same. Severe depression is also called "major" depression. The differentiation is with bipolar depression. That depression is the depressive cycle of the illness. Clinical depression is more prevalent in women. While there is no research-based reason for this, in my opinion it is because research has shown that women are more emotional than are men.

More clinical depression

He suffered from clinical depression