Both tubal lavage and hysterosalpingography are commonly used to detect infertility and are both minimally invasive methods. Both involve the vaginal placement of a rubber tube into the uterine cavity, which is approximately 3mm in diameter and usually does not require dilation. The difference is that the tube is filled with saline and the pressure is felt by hand or depicted by a machine to determine the degree of patency of the tubes. For imaging, instead of saline, an iodine-containing contrast agent is injected through the tube, observed by X-ray, and photographed. The series of films can dynamically show the contrast filling the uterine cavity, passing through the oviducts, and diffusing through the pelvis. The luminescence is simple, does not inject iodine-containing contrast, does not have to receive X-rays, and does not even interfere with trying to conceive that month. It is possible to detect a bilateral incompetence, but when one side is incompetent, it is not possible to tell which side is incompetent. A finding of “incompetence” can cause a lot of confusion in the diagnosis. An imaging can clearly show if all the ducts are open, which side is not open, and where the blockage is located in the ducts. It also shows the morphology of the uterine cavity, the presence of abnormalities such as longitudinal uterus, bicornuate unicornuate uterus and the pelvic dispersion of the contrast medium, the latter two of which are not possible with aperture. It is also important to know that both imaging and aspiration can have false-positive results (in which a patent oviduct makes an incompetent result because of tubal spasm) or false-negative results (in which an incompetent oviduct makes a patent result. Which is the best method to use for infertility patients? It is better to listen to the doctor’s opinion. If you are not allergic to iodine and have access to X-ray, you can get more information by using the imaging method.