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What Are the Symptoms of High Estrogen Levels in Perimenopause?

According to the *Study of Women Across the Nation* (SWAN), the hormonal fluctuations of perimenopause can be far more unpredictable than many assume, often involving surges of estrogen that are higher than levels experienced during peak reproductive years. This can lead to a distinct set of physical and emotional changes, so it's important to understand what are the symptoms of high estrogen levels in perimenopause and how they differ from those caused by low estrogen.