Yes and probably. I perceived improvements in cognition that correlated with the use of gonadorelin and enclomiphene. However, one possible confounding factor is that I had started taking selegiline in a similar time frame. I would tend to attribute more of the possible improvements to the GnRH, but for all I know there could be a synergistic effect. I doubt increased LH was much of a factor, as levels barely entered the normal range. Experiments in mice are promising: "A striking observation was that GnRH promoted adult neurogenesis despite aging." "GnRH led to an amelioration of aging-related cognitive decline .... Thus, prolonged elevation of systemic GnRH can cumulatively yield actions on the brain;..." Discussed here.