It's a hormone that we produce in the adrenal glands which enables and supports the production of other hormones like oestrogen and testosterone. If the adrenal glands are malfunctioning, fatigued, this process will presumably be inhibited, I imagine and could be the root cause I need more knowledge about. I need so much more clinical knowledge than a lay person like me could have to make some jigsaw pieces fit, possibly also some recommendations for appropriate testing. It all gets a bit exhausting!