What Doctors Don't Tell YouThe mainstay of modern obstetric diagnosis is the ultrasound scan (or sonography). Similar to radar, real-time scanners employ very-high-frequency pulsed sound waves (3.5-7 mHz, or 3.5-7 million cycles per second)
The mainstay of modern obstetric diagnosis is the ultrasound scan (or sonography). Similar to radar, real-time scanners employ very-high-frequency pulsed sound waves (3.5-7 mHz, or 3.5-7 million cycles per second)
