Sonohysterography is a new procedure, which helps determine tubal patency and is a minimally invasive ultrasound that captures a superior image of the uterine cavity. It uses a combination of a sterile saline catheter placed in the cervix and a transvaginal ultrasound, which produces high-frequency sound waves. The saline expands the uterine cavity this allows an excellent contrast to the lining, resulting in a superior visibility of the uterine and endometrial pathology.