Four reproductive endocrinologists will perform the HSG procedures in a standardized fashion. Fluoroscopy will ensure proper location of the cannula and check for uterine filling of contrast. Digital images will document tubal filling and spilling of contrast. The patient will be rolled to right and left side to confirm free spillage of contrast in the peritoneal cavity. The last image will be taken after the balloon tip is deflated or the cannulas are removed to best evaluate the lower uterine segment.