Tubal patency tests are undertaken when the doctors suspect that there are blockages or pelvic adhesions in the fallopian tubes. In laparoscopic tubal patency test, a tiny incision is made at the lower border of the umbilicus. The abdominal cavity is then distended with carbon dioxide gas in order to create more space to accurately view the pelvic organs. A slim telescope called a laparoscope is then inserted into the abdominal cavity and the uterus, tubes, and ovaries are thoroughly inspected.