There are many body system possibilities as to what can cause some depressions. I know my thyroid replacement and Vitamin D being in the "normal" range have helped me.

If the bioidentical hormones and saliva test weren't getting hormones up to a level one would like, I would try other methods of checking and adjusting levels: http://www.mayoclinic.com/health/bio...rmones/AN01133

I would definitely do blood tests for more than just a few hormones (saliva doesn't do all of them equally well) and I'd check with a nutritionist on what I'm eating and work on vitamins/minerals and other body systems that can impact depression. http://www.livestrong.com/article/12...on-depression/