![](http://www.alamy.com/thumbs/6/04C83D1D-0475-414A-9402-91EB69561C4C/2PGJT11.jpg)
Hormone levels
Size: 13000px × 9423px
Location:
Photo credit: © Dorling Kindersley: / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: background, blue, body, boy, boys, colour, green, growing, horizontal, hormone, hormones, human, illustration, kids, levels, man, men, people, representation, teen, teenager, white