It is interesting to note, however, that Sha and co-workers [52] published in 2007 a comparison of endothelial cells in the endometrium in endometriosis and control patients, which revealed a 6.1-fold increase (p = 0.0015) of FOXD1 mRNA level in the context of this disease, known to be a major cause of infertility. This evidence concerns the gene FOXD1 and endometriosis.