0 the time in a woman's life when changes start happening in her body that will result in the menopause (= the period when she gradually stops having blood flow from her uterus each month) -- 围绝经期（指绝经期到来之前的一段时间）
In the perimenopause, as many as 25% of women report hot flushes.
During perimenopause, a woman's periods may become less predictable.
