Mid-to-Late 30s to Mid-40s: The time period that begins 8 to 10 years before menopause and marks the beginning of declining hormone production by the ovaries.

Late 40s to Mid-50s: At this stage, the ovaries have stopped releasing eggs and producing most of their estrogen. It’s during this time women can expect to experience the bulk of menopausal discomforts.

Late 50s and Beyond. During this stage, menopausal discomforts, such as hot flashes, ease for most women, but health risks are increased.