Investigations of tubal factor of infertility include hysterosalpingography, saline infusion sonohysterography as well as diagnostic laparoscopy with chromotubation. HSG is a contrast study of the uterine cavity and fallopian tubes. It is a simple, inexpensive, safe, and rapid diagnostic procedure that, when performed properly, provides valuable information about the uterine cavity&tubal architecture. Patency of the tube, a vital determination during HSG, is usually readily recognizable by spill of contrast from the fimbriated end of the ampulla into the peritoneal cavity. Persistence of contrast in an immediate peritubal location may signify inflammatory adnexal disease. The free flow of contrast deep into the pelvis and along peritoneal reflections is common criteria of patency.