The term "HSG test" typically refers to a medical procedure called hysterosalpingography. Hysterosalpingography is an imaging test that is performed to evaluate the shape and condition of a woman's uterus and fallopian tubes. The procedure involves the injection of a contrast dye into the uterus through the cervix, followed by a series of X-rays or fluoroscopic images to visualize the dye as it fills the uterus and tubes.