At What Age Does A Woman Generally Reach Menopause?

Does late menopause cause problems? IF yes, then what could be those? Is it okay for a women in mid-fifty to not have reached menopause, if she has no problems whatsoever?
Thanks for replying!

When Do Women Generally Start Menopause And How Long Does It Last?

I’m in my early 40′s and was wondering when I should be concerned about menopause. I’ve been very moody lately and just don’t feel like myself…could this be pre-menopause? What are some of the symptoms emotional and physical that accompany menopause? How long does menopause last?