A 52 year old woman presents with complaints of fatigue, nig…

A 52 year old woman presents with complaints of fatigue, night sweats, and hot flashes. She reports her last menstrual period was over 2 months ago, but prior to that was usually every 30-40 days. In working her up for menopause, you determine she is in the late menopause transition. She asks how she will know she is in menopause. What is the best response?