is shg the same as hsg?
SHG (Sonohysterogram) Sonohysterograms (SHG) use ultrasound and sterile water, whereas Hysterosalpingograms (HSG) uses X-ray and contrast to visualize the uterine cavity and patency of the fallopian tubes. SHG may not always be able to identify patency of tubes but gives a much clearer outline of the uterine cavity.