Also, Doppler can detect abnormal blood flow within the heart, which can indicate a problem with one or more of the heart's four valves. Color Doppler. Color Doppler is an enhanced form of Doppler echocardiography. With color Doppler, different colors are used to designate the direction of blood flow.
Quick Answer. The age at which people grow armpit hair varies, but for boys it is often between the ages of nine and 14. Girls typically begin to grow this hair between eight and 13 years of age. Keep Learning.
The emergence of body hair usually begins in the pubic area about the same time as breast development, usually starting at age 10 or 11 but sometimes not occurring until age 13 or 14. Underarm and leg hair appears a year to two later.In general the color, thickness, and pattern of body hair is quite variable.he emergence of body hair usually begins in the pubic area about the same time as breast development, usually starting at age 10 or 11 but sometimes not occurring until age 13 or 14. Underarm and leg hair appears a year to two later. In general the color, thickness, and pattern of body hair is quite variable.