Effect of Intrauterine Navigation Using Intrauterine Insemination Catheter for Mock Embryo Transfer Prior to Day 3 Embryo Transfer on Pregnancy Rate: A Pilot Study

one day before the actual ET, the participants, in the study group, were taken into the operating room with a moderately full bladder at 10 am. The patient was placed in the lithotomy position and a sterile speculum was inserted into the vagina. The cervix was cleaned with sterile swabs and sterile water, and a mock transfer was performed using a soft catheter (Wallace Intrauterine Insemination Catheter; Sims Portex Ltd., Hythe, Kent, UK). The catheter has an outer sheet with memory , to aid insertion, and a soft inner catheter with atraumatic tip. Under ultrasound guidance, only the soft inner catheter was introduced beyond the internal cervical os till it was 0.5 cm from the fundus. It was, then, gently withdrawn out of the uterus, and the speculum was removed.