A method of displaying an ultrasound image includes determining a direction of a fetus's head based on a first ultrasound image obtained by scanning a pregnant woman's body in a first direction； determining a direction of a fetus's spine based on a second ultrasound image obtained by scanning the pregnant woman's body in a second direction； determining an orientation of the fetus within the pregnant woman's body based on the directions of the fetus's head and the fetus's spine； and displaying an image representing the orientation of the fetus, together with an ultrasound image obtained by scanning the pregnant woman's body.
