Focus: fallopian tubes
HyCoSy
Hysterosalpingo-contrast sonography, also called a tubal patency test
Checks whether your fallopian tubes are open. Most often requested as part of fertility investigations.
Focus: inside the uterus
Sonohysterogram
Also called saline infusion sonography (SIS)
Gives a clearer view of the uterine lining and cavity. Often used to look into abnormal bleeding or fertility concerns.