Sounds like pulsatile GnRH administration is the way to go...
I was not thrilled about the idea of using fertility treatments to induce ovulation, hoping to start again on my own, but read this "In one small 2002 study, 70% of women with FHA recovered with no therapy at all after an average of eight years."
This is by far the best article I've found to date. Most complete explanation of the different underlying causes of HA, as well as treatment. Mentions pulsatile GnRH as the ideal treatment, with 90% ovulation, 30% preganancy / cycle, low rate of multiples... OF COURSE not available in the US. WTF?