Obstetric ultrasonography is the use of
medical ultrasonography in
pregnancy, in which sound waves are used to create real-time visual images of the developing
embryo or
fetus in its mother's
uterus (womb). The procedure is a standard part of
prenatal care in many countries, as it can provide a variety of information about the health of the mother, the timing and progress of the pregnancy, and the health and development of the embryo or fetus.