normal puberty age
Although there is a wide range of normal ages, girls typically begin the process of puberty at age 10 or 11; boys at ages 11â12. Girls usually complete puberty by ages 15â17, while boys usually complete puberty by ages 16â17.The major landmark of puberty for females is menarche, the onset of menstruation, which occurs on average between ages 12â13; for males, it is the first ejaculation, which occurs on average at age 13.n boys, testicular enlargement is the first physical manifestation of puberty (and is termed gonadarche). Testes in prepubertal boys change little in size from about 1 year of age to the onset of puberty, averaging about 2â3 cm in length and about 1.5â2 cm in width.