**2. The incidence of endometriosis of Uyghur ethnic group in Xinjiang**

The incidence of endometriosis has no precise information. Researchs have found that Asian women with endometriosis have a higher prevalence, and its disease risk :OR:8.6(95%CI ll.4一20.7). There was an exploratory study suggested that there might be an associated risk of endometriosis for those women who have worked as a flight attendant, service station attendant, or health worker, particularly a nurse. But they have not been reported the correlation between nationality, religion and other factors with endometriosis.

Clinical and epidemiological survey found that endometriosis has a genetic predisposition and significant family aggregation, and it loss of heterozygosity of 40% -70%. Dingyan(researcher in Xinjiang) found that no evidence was found to suggest an association between GSTM1-null genotype and endometriosis in the Hans chinese and Uyghurs. An association was found between GSTT1 -null genotype and endometriosis in the Hans chinese, but not in the Uyghurs. The two ethnic groups have different genetic predisposing factors to the development of endometriosis. There were significant difference in the frequencies of these two points among the Han chinese, European and Uyghur in Xinjiang. In Uyghur the distribution of CYP 1 A 1 /MspI genotypes were different from Han chinese and European.
