To define the roles of miR-342/ANXA2 axis in the occurrence of endometriosis, we co-transfected endometrial stromal cells with NC mimic + NC vector, miR-342 mimic + NC vector, NC mimic + ANXA2 vector, or miR-342 mimic + ANXA2 vector, respectively. The gene discussed is ANXA2; the disease is endometriosis.