On the contrary, the first published results on gamma H2AX in endometriosis demonstrated that in the secretory and proliferative phase, non-endometriosis endometrium had higher gamma H2AX staining than endometrium among patients without the disease, in both epithelial and stromal cells, but no comparison to endometriotic lesions was made [64]. This evidence concerns the gene H2AX and endometriosis.