As well, increased repetitions ofCATT and C allele in MIF promoter were associatedwith increased susceptibility to endometriosis in ourpopulation and this was related to transcriptional activityof MIF. These findings provide the first insight that MIFpromoter polymorphisms may have a significant effecton susceptibility towards endometriosis; however, furtherstudies are required to determine contribution of MIF todevelopment of endometriosis. This evidence concerns the gene MIF and endometriosis.