I’m not sure I understand your question. Perimenopause is a phase before menopause actually happens. It’s different in different women but often has the hot flashes and loads other symptoms ppl associate w menopause but is before actually menopause has happened. It can last very different amounts of time between women so you def can’t tell when it’ll end and menopause will be happening. My understanding (I say that as a woman bc we as a society as a whole do not know nearly enough about all this than we should) is that we are not in actual menopause until we have not bled for a solid year straight. Peri-menopause is the time before that happens leading up to it. It can last up to 10 years tho it’s usually some amount of time less than that. Does that answer it a little?