A method of generating an ultrasound image, performed by an ultrasound imaging apparatus, the method comprising: transmitting ultrasound signals to an object; receiving ultrasound echo signals from the object; and the method comprising the following steps performed by a processor: generating ultrasound image data based on the received ultrasound echo signals; identifying a fetus's skull from the ultrasound image data; identifying, based on the identified fetus's skull, a caput succedaneum region corresponding to caput succedaneum occurring in the fetus; wherein the generating of the ultrasound image data comprises generating a plurality of ultrasound cross-sectional images, each including the fetus, wherein the identifying of the fetus's skull comprises identifying the fetus's skull from each of the plurality of ultrasound cross-sectional images, wherein the identifying of the caput succedaneum region comprises: selecting an ultrasound cross-sectional image showing the fetus's skull as being largest from among the plurality of ultrasound cross-sectional images; identifying the caput succedaneum region from the selected ultrasound cross-sectional image; and measuring a thickness of the caput succedaneum region based on a normal line that is a longest one among normal lines to the fetus's skull that pass through the caput succedaneum region; and wherein the method further comprises displaying information about the caput succedaneum region, wherein the displaying of the information about the caput succedaneum region comprises displaying the measured thickness of the caput succedaneum region. transmitting ultrasound signals to an object; receiving ultrasound echo signals from the object; and the method comprising the following steps performed by a processor: generating ultrasound image data based on the received ultrasound echo signals; identifying a fetus's skull from the ultrasound image data; identifying, based on the identified fetus's skull, a caput succedaneum region corresponding to caput succedaneum occurring in the fetus; wherein the generating of the ultrasound image data comprises generating a plurality of ultrasound cross-sectional images, each including the fetus, wherein the identifying of the fetus's skull comprises identifying the fetus's skull from each of the plurality of ultrasound cross-sectional images, wherein the identifying of the caput succedaneum region comprises: selecting an ultrasound cross-sectional image showing the fetus's skull as being largest from among the plurality of ultrasound cross-sectional images; identifying the caput succedaneum region from the selected ultrasound cross-sectional image; and measuring a thickness of the caput succedaneum region based on a normal line that is a longest one among normal lines to the fetus's skull that pass through the caput succedaneum region; and wherein the method further comprises displaying information about the caput succedaneum region, wherein the displaying of the information about the caput succedaneum region comprises displaying the measured thickness of the caput succedaneum region. generating ultrasound image data based on the received ultrasound echo signals; identifying a fetus's skull from the ultrasound image data; identifying, based on the identified fetus's skull, a caput succedaneum region corresponding to caput succedaneum occurring in the fetus; wherein the generating of the ultrasound image data comprises generating a plurality of ultrasound cross-sectional images, each including the fetus, wherein the identifying of the fetus's skull comprises identifying the fetus's skull from each of the plurality of ultrasound cross-sectional images, wherein the identifying of the caput succedaneum region comprises: selecting an ultrasound cross-sectional image showing the fetus's skull as being largest from among the plurality of ultrasound cross-sectional images; identifying the caput succedaneum region from the selected ultrasound cross-sectional image; and measuring a thickness of the caput succedaneum region based on a normal line that is a longest one among normal lines to the fetus's skull that pass through the caput succedaneum region; and wherein the method further comprises displaying information about the caput succedaneum region, selecting an ultrasound cross-sectional image showing the fetus's skull as being largest from among the plurality of ultrasound cross-sectional images; identifying the caput succedaneum region from the selected ultrasound cross-sectional image; and measuring a thickness of the caput succedaneum region based on a normal line that is a longest one among normal lines to the fetus's skull that pass through the caput succedaneum region; and wherein the method further comprises displaying information about the caput succedaneum region, wherein the displaying of the information about the caput succedaneum region comprises displaying the measured thickness of the caput succedaneum region.