A hysterosalpingogram (HSG) is an X-ray test that looks at the inside of the uterus and fallopian tubes and the area around them. It is a commonly used test for women who are having a hard time becoming pregnant.
How Does It Work?During a hysterosalpingogram, a dye (contrast material) is put through a thin tube that is put through the vagina and into the uterus. The uterus and the fallopian tubes are connected, so the dye will flow from the uterus into the fallopian tubes. X-ray pictures are taken as the dye passes through the uterus and fallopian tubes. The pictures can show problems such as an injury or abnormal structure of the uterus or fallopian tubes, or a blockage that would prevent an egg from moving through a fallopian tube to the uterus. A blockage could also prevent sperm from moving into a fallopian tube and joining (fertilizing) an egg. A hysterosalpingogram may find problems on the inside of the uterus that prevent a fertilized egg from attaching (implanting) to the uterus.
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