Hi Migraine Cindy,
Thank you for your question, it's an important one.
In addition to Joanna's information, we do have some numbers on migraine and hysterectomy I can share with you.
There doesn't seem to be a concrete way to see which women will see a reduction in migraine attack frequency and who won't. I can tell you some women find their migraine attacks get better after natural menopause and some get worse. Studies show when women go through natural menopause 67% find that their migraine attacks get better, 9% of women find they get worse, and 24% find their migraine attacks don't change at all.
On the other hand when women have surgical menopause almost the opposite is true; 33% of women find their migraine attacks get better, 67% find their migraine attacks get worse and there is an insignificant (study wise) number of women whose migraines don't change at all.
Migraine experts recommend that women considering a hysterectomy do not proceed if they're considering it only because of migraine disease.
I hope this helps!
Nancy