Perimenopause is the transition between where a woman is going into menopause. The transition typically starts between the early 40s. Some women do experience it in the late 30s, so there's a lot of signs and symptoms involved to know if you're entering into perimenopause. The biggest sign that women tend to complain about is hot flashes, insomnia, irregular periods, low sex drive, that’s just to name a few. There's a lot of hormonal imbalances that women go through that time. So the way to know that you're going out of perimenopause is no periods or no menstrual cycles for one year and at that point you have considered to cross the finish line - you're in menopause at that point.