What is a Hysterosalpingogram (HSG)
A hysterosalpingogram (HSG) is an X-ray test that looks at the inside of the uterus and fallopian tubes and the area around them.
During a hysterosalpingogram, a dye is put through a thin tube that is placed through the vagina and into the uterus. From the uterus the dye moves into the fallopian tubes. Pictures are taken using a steady beam of X-ray (fluoroscopy) as the dye passes through the uterus and fallopian tubes. Theimages can show problems such as an injury or abnormal structure of the uterus or fallopian tubes, or a blockage that would prevent an egg moving through a fallopian tube to the uterus. A blockage also could prevent sperm from moving into a fallopian tube and fertilizing an egg. A hysterosalpingogram also may find problems on the inside of the uterus that prevent a fertilized egg from implanting to the uterine wall.