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The average age of onset of puberty is 10–11 for girls and 11–12 for boys. [10] [11] Every person's individual timetable for puberty is influenced primarily by heredity, although environmental factors, such as diet and exercise, also exert some influences. [12] [13] These factors can also contribute to precocious and delayed puberty. [14] [13]
Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction.It is initiated by hormonal signals from the brain to the gonads: the ovaries in a female, the testicles in a male.
Preadolescence is a stage of human development following middle childhood and preceding adolescence. [1] It commonly ends with the beginning of puberty. [2] Preadolescence is commonly defined as ages 9–12 [3] ending with the major onset of puberty.
Teen pregnancies, defined as pregnancies in females under the age of 20, regardless of marital status, in the United States decreased 28% between 1990 and 2000 from 117 pregnancies per every 1,000 teens to 83. [6] The 2008 rate was a record low and represented a 42% decline from the peak rate, which had occurred in 1990. [17]
Puberty is considered delayed when the child has not begun puberty when two standard deviations or about 95% of children from similar backgrounds have. [7] [8] [9]In North American girls, puberty is considered delayed when breast development has not begun by age 13, when they have not started menstruating by age 15, [2] and when there is no increased growth rate. [8]
Breen’s suit claims Olson-Kennedy’s clinic put her on puberty blockers when she was just 12, started her on hormone therapy at 13 and performed a double mastectomy on her at 14.
The puberty ritual for the young Roman male involved shaving his beard and taking off his bulla, an amulet worn to mark and protect underage youth, which he then dedicated to his household gods, the Lares. [2] He assumed the toga virilis ("toga of manhood"), was enrolled as a citizen on the census, and soon began his military service. [3]
World renowned Austrian neurologist Sigmund Freud introduces his theory on psychosexual development, which asserts that there is an immature clitoral orgasm and a mature vaginal orgasm. He states that the clitoris is the site for pre-pubescent orgasms but upon reaching puberty, healthy women should begin having vaginal orgasms instead.