A progesterone blood test is done to find out how much of the progesterone hormone is in a sample of blood. This female hormone is produced each time a mature egg is released from an ovary after a process referred to as ovulation. This hormone really helps to prepare the endometrium (uterine lining) to take the egg if sperm fertilizes it. If the egg goes without being fertilized, menstrual bleeding occurs and progesterone levels drop. Rheumatologists have a special interest in unexplained rashes, fever, arthritis, anemia, weakness, weight loss, fatigue, joint or muscle pain, autoimmune diseases and anorexia. They often act as consultants, acting as medical detectives at the request of other doctors. Low joint JIA has a good recovery rate, less long-term efficacy. However, children with this condition may have ocular problems and it is therefore advisable to have regular eye exams with ophthalmologists (eye care specialists).