I finished my last chemo treatment for IBC Stage IV in March of 2005. My hair came in curly. I had always had straight hair and the curl and thickness did not last long. It seems to be thinning more all the time. I am 67 and like you had always had thick hair. I cannot find a style that looks good as it has not body, is very fine and breaks easily. I read that B vitamins may help and I have been taking them for about 6 months. No change. I do get a perm now, but did not for a good year after. It is just so listless I have to do something and I do hate the wigs. I really am thankful that I am in remission but so discouraged with the hair. Thinking of going to a specialist for hormone regulation but I don't think there is anything to be done.
Congratulations on completing your treatment. I don't know if hair re-growth is related to being post-menopausal or not, but I do know that everyone has a different situation. I will tell you my experience in hopes it will help you in some way.
I was 58 and post-menopausal. I finished my chemo in April and it was September before I could even consider going without a wig. Even then, my hair was very short.
I,too, had always had very thick hair. When my hair came back it was thinner and finer than it had been before. Five years later, it remains thinner and finer. It was an adjustment learning to re-style this new hair. Interestingly, when my hair first came back in it was very,very curly. That lasted for about a year and then went back to being very straight as it had been before. Another interesting side effect is that my underarm hair never has returned. No more armpit shaving for me!