Fibromyalgia isn't passed directly from parents to children the way diseases such as cystic fibrosis and hemophilia are. But family studies have found that the odds of having fibromyalgia are several times higher in the immediate families of people with fibromyalgia than in families in which no one has fibromyalgia. These observations suggest that heredity is a factor in causing fibromyalgia. There is a high aggregation of FMS in families of FMS patients. Fibromyalgia is an idiopathic, chronic pain syndrome defined by widespread nonarticular musculoskeletal pain and generalized tender points .The mode of inheritance is unknown but it is most probably polygenic.Fibromyalgia overlaps with several related syndromes, collectively compromising the spectrum of the functional somatic disorder. FMS is characterized by a strong familial aggregation. Peer review refers to the work done during the screening of submitted manuscripts and funding applications. This process encourages authors to meet the accepted standards of their discipline and reduces the dissemination of irrelevant findings, unwarranted claims, unacceptable interpretations, and personal views. Publications that have not undergone peer review are likely to be regarded with suspicion by academic scholars and professionals.