There are two main methods to determine whether the fallopian tubes are blocked: 1) a tubal lavage and 2) a tubal angiogram. These two methods are both invasive tests, but tubal imaging is more objective and can reflect the patency of the fallopian tubes, and can see the shape of the tubes and the presence of fluid, so it is currently the preferred test method. If the patient has not had an abortion or other uterine operation, is not pregnant because of pregnancy preparation, and is just having a routine preconception checkup, it is not recommended to have a tubal examination. This is because tubal examination can also cause upstream infection and lead to incompetence or spread of inflammation in the fallopian tubes. When a patient is unable to conceive for more than half a year and the ovarian and uterine factors have been ruled out, tubal examination can be done if pregnancy is affected.