I started peri-menopause when I was 32 so it can start at a very young age... It really freaked out my docs when they saw how high my FSH level was/is. My neurologist went so far as to order an emergency MRI to make sure I didn't have a tumor on my pituitary gland. Nothing wrong medically speaking; just earlier than most. The upside is that I only have a slight mini-period maybe once every 12-16 months. NO COMPLAINTS HERE & soooo do not want to have another kiddo... but I am STILL very careful.
My mom thought she was in full blown menopause when she was 37 because she did not have a period for over a year (that is the usual indicator)... SURPRISE! Here I am posting a message about it.