Hysterosalpingogram (HSG) Hysterosalpingogram is an important method for the diagnosis of tubal infertility. Hysterosalpingography can visually show the size and shape of the uterus, as well as the length, alignment and regularity of the walls of the fallopian tubes. It can give an accurate description of the patency and the site of adhesions and obstruction, and also has a partially unblocking effect. The tubal imaging examination requires that the examination should be performed within 3-7 days after menstruation, no sexual intercourse before the procedure, and no intercourse in the same month.