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)

A drop in oestrogen levels during perimenopause and menopause can lead to thinning hair.

In addition to irregular periods, the perimenopause can lead to sleep disruption, irritability, and hot flushes. 除了月经不调外，围绝经期还可能导致睡眠中断、易怒和潮热。