Paleopathology (palaeopathology, traditional British spelling) is the study of ancient health and disease. The field is interdisciplinary, stretching from art history to paleontology and from parasitology to genomics.
Less common symptoms of low estrogen levels include: 1  Thinning hair. 2  Weight gain. 3  Arthritis. 4  Difficulty concentrating.
During and after menopause, women experience a drop in estrogen levels, as well as a shift in the balance of estrogens that the body produces. Before menopause, the ovaries produce the main source of estrogen, and the main type of estrogen produced is known as estradiol. After menopause, the main source of estrogen is androstenedione, which is produced by the adrenal gland and is converted into an estrogen known as estrone. Menopausal symptoms and changes result from the decrease in estrogen and the shift from estradiol to estrone.