This is a main category requiring frequent diffusion and maybe maintenance. As many pictures and media files as possible should be moved into appropriate subcategories.
Human stages of development in Wikimedia Commons
Young (birth to ~40 years)
Children (birth to ~18 years)
Babies (birth to ~4 years)
Preteens (9 to ~13 years)
Teenagers (13 to ~18 years)
Adults (18 years till death)
Young adults (18 to ~40 years)
Middle-aged (40 to ~60 years)
Old (60 years till death)
Definitions come from, but are slightly modified from, the English Wikipedia articles on the development of the human body.
Subcategories
This category has the following 4 subcategories, out of 4 total.