Hysterosalpingo-contrast-sonography (HyCoSy) is an ultrasound procedure used to assess the uterine cavity and the patency of the fallopian tubes. It involves placement of a small catheter through the internal os of the cervix followed by injection of sterile saline and air bubbles. In optimal circumstances, the passage of agitated saline can be visualized in the fallopian tubes and cul-de-sac illustrating tubal patency. When HyCoSy is inconclusive, hysterosalpingography (HSG), selective salpingography/tubal cannulation or laparoscopy can be helpful.