Please indicate the number of reproductive instances for each item.
Pre-menopause is normal or fairly normal menstrual cycles (usually between the ages of 12-51)
Peri-menopause is the time in which a woman's flucuating hormone levels cause changes and irregularities in the menstrual cycle. This is the time period which eventually leads to a woman's last period and menopause. This usually occurs between the ages of 40-55 but many medical conditions can alter this age range.
Menopause (and beyond) No menstrual cycles for greater than one year. Usually after the ages of 45-55)