Endometrial Injury In Recurrent Implantation Failure

All office hysteroscopy procedures will be done transvaginally under sedation with a 5 mm 30 degree lens supplied with a 5 F working channel continuous flow office hysteroscope (Bettocchi office hysteroscope, Karl Storz, Tuttlingen, Germany) without speculum or tenaculum. Briefly, following cervical passage and initial endometrial cavity investigation endometrial injury will be performed without energy modality (i.e. with scissors). Endometrial injury will perform first on the fundus by cutting into the endometrium (without injuring the myometrium) transversally. Later, vertical incisions will perform 0,5 cm apart each other, on the anterior and posterior walls of the uterus, 1-1.5 cm away from the fundus and one cut for each lateral wall