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.
Estrogens are hormones produced by the body. Among other things, estrogens help develop and maintain female organs. When your body is in short supply of this hormone, replacing it can ease the uncomfortable changes that occur in the vagina, vulva (female genitals), and urethra (part of the urinary system).