This stage begins 8-10 years before menopause kicks in (for most women, this phase begins in the 40s). The ovaries produce less estrogen. Periods start becoming irregular. Toward the end of this stage, most women start experiencing menopause symptoms, but they may still be getting their period and could still get pregnant.
This stage marks the point when menstrual periods have ended. The ovaries are no longer releasing eggs. If periods have ceased for one full year, menopause has started. Most women experience menopause sometime during their 40s or 50s.
This stage marks the rest of life after menopause has set in. For most women, menopause symptoms reduce during this stage. However, because estrogen levels are lower, postmenopausal women are at risk for health conditions like heart disease and osteoporosis.