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.
(I got armpit hair around 11 1/2 but everyone is different) From around age 13-16 but it can still happen earlier or later (maybe even 12 and 19) got mine just before i turned 14. Brent Lyday.
Normal puberty begins between eight and 14 years of age in girls and between nine and 14 years of age in boys. Pubic hair distribution is used to stage puberty, along with breast size and contour in girls and testicular volume in boys.