Pubic hair in boys and girls | |
P1 | No hair |
P2 | A few long hairs on the pubis (down) |
P3 | Pubic hair above the symphysis |
P4 | Plenty pubic hair |
P5 | Extension of hair towards the roots of the thighs, and towards the navel in boys |
Breast development in girls | |
S1 | Lack of breast development |
S2 | Small breast bud with enlargement of the areola |
S3 | The mammary gland protrudes above the surface of the areola |
S4 | Appearance of a sub-mammary fold, protrusion of the areola and nipple |
S5 | Adult appearance, disappearance of the areola protrusion |
Development of the external genitalia in boys | |
G1 | Infant-sized testicle and penis |
G2 | Increase in testicular volume by 4-6 ml |
G3 | Increase in the penis and testicular volume of 6 – 12 ml |
G4 | Increase in the penis and testicular volume from 12 to 16 ml |
G5 | Adult morphologies |