Adolescents And Their Development

Biochemical Changes occurring in Adolescents

One of the first neuroendocrine changes at puberty is the maturation of the gonadotropic hormones, or the GnRH pulse generator. Adrenal androgen production happens before testicular androgen production, primarily the dehydroepiandrosterone sulphate (DHEAS). Adrenarche, a disease characterized by symptoms like underarm odor and faint genital hairs, can start as early as age 6. 

In the teen years, puberty usually happens a few years following adrenarche. When a youngster achieves sexual maturity, their body goes through changes known as puberty. In contrast to the physical changes that accompany puberty, the main developmental stage of adrenarchy is emotional and psychological. It persists during puberty, with levels of adrenal androgen gradually rising until they reach their peak in maturity.

Developmental Characteristics of Adolescence in Females

Sequence of Pubertal Development

One of the first neuroendocrine changes at puberty is the maturation of the gonadotropic hormones, or the GnRH pulse generator.

Adrenal androgen production happens before testicular androgen production, primarily the dehydroepiandrosterone sulphate (DHEAS). Adrenarche, a disease characterized by symptoms like underarm odor and faint genital hairs, can start as early as age 6. 
In the teen years, puberty usually happens a few years following adrenarche. When a youngster achieves sexual maturity, their body goes through changes known as puberty.  In contrast to the physical changes that accompany puberty, the main developmental stage of adrenarchy is emotional and psychological. It persists during puberty, with levels of adrenal androgen gradually rising until they reach their peak in maturity.

Menarche: A female adolescent's first menstrual period is known as menarche. The menarche always happens three years after the thelarche.

The onset of the thelarche depends on many factors:

• Genetic factors.
• Environmental factor.
• Weight and nutrition status.

Also Read: Nutritional Assessment And Indices

Sexual Maturity Rating/SMR Staging in Females

A woman's pubic hair and breast size are taken into consideration when judging her sexual maturity.

The following table shows the respective sexual maturity ratings based on physical appearance.

Also Read: DYSLEXIA – Types, Clinical features and Management

Developmental characteristics of adolescence in Males  

The sequence of pubertal growth in males

In males, the enlargement of the testicles is the first obvious symptom of pubertal growth. This is usually followed by the appearance of pubic hairs, which appear six months later.

Penile development occurs following pubic hair emergence; • The peak growth spurt is larger than in females, but it happens 6 months to 2.5 years later than in a female of the same age.

Also Read: Navigating the Developmental Journey of Children: Significant Events and Beyond

Sexual Maturity Ratings/SMR Staging in Males

The following table is given below showing the respective sexual maturity ratings and  based on the physical appearance

The following graph represents the sexual development of both males and females.

This graph shows that peak growth velocity in females comes early as compared to males but it is lesser as compared to males.

Somatic Growth Patterns in Adolescence:

It happens from distal to proximal, meaning that the body's lateral regions develop more quickly than its central region.

An Interesting fact 

• Skeletal growth always precedes muscular growth 
• That's why sprains and strains are common  in adolescents

Other Physiological Changes in Adolescence:

Modification of lean body mass and fat deposition: Males mostly exhibit an increase in lean muscle, while females primarily exhibit a decrease in fat composition, particularly in the thigh and buttock areas. 

Variations in heart rate and blood pressure between males and females are caused by changes in the cardiovascular system.  Modifications to the lungs: a rise in vascular capacity.  When there are modifications to the globe's elongation, myopia becomes an issue. 

Modifications to the larynx and pharynx—far more pronounced in men than in women.  Males experience far greater changes in the glandular system than females do. Apocrine and sebaceous gland production is increased. 

Modification of the calcium deposit. During puberty, 50–60% of the total calcium is deposited.

Also Read: NEET SS Pediatrics Growth and Development Questions

Hope you found this blog helpful for your Growth and Development NEET SS pediatrics preparation. For more informative and interesting posts like these, keep reading PrepLadder’s blogs.