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)
A surprising one in seven people have a hearing loss - that’s about 8.7 million in the UK alone. Age-related hearing loss usually begins at 50 and, according to the Royal National Institute for Deaf People,
