How the ultrasound works
- Ultrasound imaging involves bouncing "ultrasonic" sound waves at body structures or tissues, and detecting the echoes that bounce back.
- Obstetric ultrasonography is used to image a human fetus inside its mother's womb.
- Based on the angle of the beam, and the time it takes for echoes to return, an image of body structures inside the fetus can be generated.
- It's used to confirm a pregnancy, to identify the sex and number of fetuses and to detect fetal abnormalities such as microcephaly, absence of kidneys, and spinal problems.
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