was sind östrogen — what symptoms are typical?

Estrogens are key female sex hormones that regulate many bodily functions. Typical symptoms of estrogen deficiency (e.g., during menopause) include hot flashes, night sweats, sleep disturbances, vaginal dryness, mood swings, reduced libido, and joint pain. Excess estrogen (estrogen dominance) may cause breast tenderness, bloating, heavy or irregular periods, weight gain, and mood changes. However, these symptoms are non-specific and can have various causes. The provided context does not contain specific information about estrogen or its symptoms. This answer is based on general medical knowledge and clinical practice. Any individual health decisions should be discussed with a healthcare provider.