Personlly I feel that I can attest to the entire hormone levels contributing to the BPD war. If not a direct coorolation it certainly doesn't help matters. I am 48, have been in peri menopause for a few years. NEVER before this stage did my BPD manifest itself the way it does now; in fact, though I've always had some problems BPD related looking back, I wasn't even diagnosed and didn't need the help that I do now until about a year ago. I guess that's proof enough for me, but I am working on having some hormone testing done at whatever the cost .... in hopes that something can be given me in order to help ease the difficulty. I have googled rage, etc. in perimonpause ~ we are NOT alone; there are many women who experience extremes just like we do! I would agree, definitely NOT the core reason, but misery seems to like company. Lol