B.C.
Peri-menopause means you still have periods but they become less regular until they eventually stop.
I've had occasional hot flashes and increasingly irregular periods for about 10 years now.
I can expect it to go on like this for maybe 5 more years but at this point I wish it would quit it already.
I'll be 51 next month and my periods are getting fewer (my personal best so far is 63 days) but I still get them.
When you've had no period for entire year then you are officially in full menopause.
Your gynecologist will tell you all about it!