Prior to the Hysterosonogram, a Transvaginal Ultrasound will be performed to establish a baseline for the thickness of the endometrium (lining of the uterus) and determine any abnormalities that may exist. This type of Ultrasound is similar to a gynecologic exam, which involves you lying on your back with your feet in stirrups while a transducer is inserted into the vagina, allowing images of the uterus and ovaries to be taken from different angles. Once the Transvaginal Ultrasound is complete, you will remain in the same position for the Hysterosonogram. During this exam, a speculum will be used to dilate the vagina so that the cervix can be seen and cleansed. Then, a catheter is placed into the uterine cavity to transport sterile saline into the uterine cavity. The speculum will be removed and the transvaginal probe will be reinserted into the vagina to capture more detailed images of the uterine cavity as it is filled with sterile saline. The entire procedure takes about 30 minutes.