Hi friend, See this link:
It explains the procedure clearly. Here a dye is injected and using a small scope (camera- lens
) inside the abdomen, the uterus
and tubes are seen on a TV / monitor. If dye is seen coming from the tubes via the openings, it is normal. If no dye comes from the tube (Fallopian), then it means there is a block of one or both Fallopian tubes.
Hope this helps.