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.
06-05-2007, 12:11 AM. I started the day after my 11th birthday and my daughter started about a month after her 13th birthday. The pubic hair and armpit hair came in months before she started her period. The armpit hair wasn't long at all once she started sprouting some pubic hair.