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.
This is why women naturally go through menopause and stop having their periods after their normal reproductive years. For many women who are of reproductive age, low estrogen can cause missed or irregular periods. In fact, amenorrhea in young women is one of the best clinical indicators for estrogen deficiency.