There was no difference between the endometriosis and control groups in any menstrual cycle phase on the number of CD4+ iNKT cells expressing IL-17 (9.8 [0‒17.5] vs. 11.7 [6.6‒16.9]; p = 0.711) and CD8+ iNKT cell expressing IL-17 (3.95 [0‒54.5] vs. The gene discussed is IL17A; the disease is endometriosis.