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It's Perfectly Normal: Changing Bodies, Growing Up, Sex, and Sexual Health is a children's book written by Robie Harris and illustrated by Michael Emberley. The purpose of the book is to inform preadolescent children about puberty by exploring different definitions of sex . [ 1 ]
As part of a science program on Norwegian public television , a series on puberty intended for 8–12-year-olds includes explicit information and images of reproduction, anatomy, and the changes that are normal with the approach of puberty. Rather than diagrams or photos, the videos were shot in a locker room with live nude people of all ages.
Physical growth in stature and weight occurs for 15–20 years following birth, as the individual changes from the average weight of 3.5 kg (7.7 lb) and length of 50 cm (20 in) at full term birth to their final adult size.
A similar book aimed at boys between the ages of nine and twelve, Guy Stuff: The Body Book for Boys, was written by Natterson. It discusses the physical, social and emotional changes that boys may experience during puberty, as well as general hygiene and health issues commonly encountered during adolescence. [15] [16]
The transformation of güevedoces into an adult male at puberty, which is reported to be celebrated in Dominican culture, is the result of a genotypic male (with XY chromosomes) born with a deficiency in the enzyme 5α-reductase. 5α-Reductase is responsible for the reduction of testosterone to dihydrotestosterone.
Developmental psychology is the scientific study of how and why humans grow, change, and adapt across the course of their lives. Originally concerned with infants and children , the field has expanded to include adolescence , adult development , aging , and the entire lifespan. [ 1 ]
Puberphonia (also known as mutational falsetto, functional falsetto, incomplete mutation, adolescent falsetto, or pubescent falsetto) is a functional voice disorder that is characterized by the habitual use of a high-pitched voice after puberty, hence why many refer to the disorder as resulting in a 'falsetto' voice. [1]
Mini-puberty is a transient hormonal activation of the hypothalamic-pituitary-gonadal (HPG) axis that occurs in infants shortly after birth. This period is characterized by a surge in the secretion of gonadotropins (LH and FSH) and sex steroids (testosterone in males and estradiol in females), similar to but less intense than the hormonal changes that occur in puberty during adolescence.