It is a stage of human development, prior to adolescence. It is considered normal between 9 or 10 and 12 years. Physiological changes begin in it, especially regarding sexual development.
Pre-adolescence age, is estimated between 9 and 13 years. See pre-puberty.
PREADOLESCENCE period prior to puberty between the age of 10 and 12, when some girls may already become pregnant.