Assertion: puberty's age | /r/HasProperty | 9 and 14 years
Facets:
Source sentences:
text: The age for normal onset of puberty is based on data from the 1960s.8 Pubertal onset is considered normal between ages 8 and 13 years in girls and ages 9 and 14 years in boys.8 Puberty usually lasts for about 3 years from onset to full maturation.5