The Tanner scale (also known as the Tanner stages or Sexual Maturity Rating (SMR)) is a scale of physical development in children, adolescents and adults.The scale defines physical measurements of development based on external primary and secondary sex characteristics, such as the size of the breasts, genitals, testicular volume and development of pubic hair.
Jul 28, 2015 · Puberty: Tanner Stages – Boys. July 28, 2015. light pubic hair begins at the base of the penis. Testicles and scrotum grow but the penis probably does not. Erections are becoming more frequent. The aureole, the dark skin around the nipple, darkens and increases in size – yes, even in boys.
The Tanner Stages I Preadolescent no sexual hair II Sparse, pigmented, long, straight, mainly along labia and at base of penis III Darker, coarser, curlier IV Adult, but decreased distribution V Adult in quantity and type with spread to medial thighs Fig. 9-24, B.
Tanner Stage Calculator for Boys My penis has gotten longer when I'm erect in the last year or two. The head of my penis (the glans) has gotten darker (redder) in color. Dr. Tanner divided development into five stages: Stage 1: Is childhood. It lasts from birth until puberty.