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Changing relation b/t puberty & psychosocial
transitions into adulthood
Patton & Viner,
The Lancet
March 2007
10
20
30
0
Mismatch
biological &
psychological
transitions
menarche
Psychosocial
maturation
age
20,000
2000
200 50 now
HG
Agric.
IR
Mid
20 C