Signs of Perimenopause in Your 40s Perimenopause is the transition before menopause. It often begins in a woman’s 40s, when estrogen and progesterone levels fluctuate. These changes can affect periods, sleep, mood, and overall well-being. 8 Common Signs of Perimenopause 1. Irregular periods: Periods may become shorter, longer, heavier, lighter, or less predictable. 2. Hot […]