How is an endometrial receptivity test performed?

To perform the endometrial receptivity test, it is necessary to do perform an endometrial biopsy on the woman with a special pipe through the cervix and without anaesthesia, a sample of the endometrium located at the fundus of the uterus is taken. 

Once the endometrial tissue has been collected, it is placed in a suitable sterile container and kept at low temperatures until it is processed.