puberty

(redirected from precocious puberty)
Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.

puberty

(pyo͞o`bərtē), period during which the onset of sexual maturity occurs. It usually takes place between the ages of 10 and 15 in both sexes but sometimes occurs as early as 7 or 8 years of age in females. The pituitary glandpituitary gland,
small oval endocrine gland that lies at the base of the brain. It is sometimes called the master gland of the body because all the other endocrine glands depend on its secretions for stimulation (see endocrine system).
..... Click the link for more information.
 secretes hormones that stimulate enlargement and development of the sex organs, which thus become capable of reproduction. The appearance of secondary sex characteristics also occurs during puberty. In females the reproductive cycle of ovulation and menstruationmenstruation,
periodic flow of blood and cells from the lining of the uterus in humans and most other primates, occurring about every 28 days in women. Menstruation commences at puberty (usually between age 10 and 17).
..... Click the link for more information.
 begins, pubic hair appears, and development of the breasts and other body contours takes place. Physical changes in males include production and discharge of semen, appearance of facial and body hair, and deepening of the voice. Skin difficulties, such as acneacne,
common inflammatory disease of the hair follicles and sebaceous glands characterized by blackheads, whiteheads, pustules, nodules and, in the more severe forms, by cysts and scarring. The lesions appear on the face, neck, back, chest, and arms.
..... Click the link for more information.
, may affect both sexes. Puberty, a transition period coinciding with adolescenceadolescence,
time of life from onset of puberty to full adulthood. The exact period of adolescence, which varies from person to person, falls approximately between the ages 12 and 20 and encompasses both physiological and psychological changes.
..... Click the link for more information.
, involves both physiological and psychological adjustments. It is often marked by emotional stress arising as the adolescent relinquishes childhood behavior patterns and adopts those of an adult.

Puberty

 

the period in an animal’s development during which, as a result of profound internal changes, it attains sexual maturity, or the ability to reproduce.

In man, puberty is marked by accelerated growth of some parts of the skeleton followed by establishment of the body’s definitive proportions, the formation of secondary sex characteristics and final development of the sexual organs. An important feature of puberty is the release from the body of products of the external and internal secretions of the sexual glands. In girls this leads to the onset of the menstrual cycle, and in boys to the ability to ejaculate, usually at first in the form of noctural emissions.

During puberty there is a restructuring of hormonal regulation and of physical and mental development. The latter includes sexual awareness, that is, the awareness that the individual belongs to a specific sex and the ability to regulate sexual behavior in accordance with society’s moral and ethical standards. Several stages may be distinguished in the growth of sexual awareness: elementary and nonsensual notions of sexual differences, platonic love, the awakening of specifically sexual feelings associated with the genital area, and mature sexual awareness, which is the harmonious correlation of all its components.

The onset and tempo of puberty are determined by the interaction of inherent physical factors and environmental influences. The age of the onset of puberty varies widely within the following limits, with allowance made for the processes of acceleration. In girls puberty occurs between eight and 17 years of age, and in boys between ten and 20. Unfavorable living conditions and such factors as poor diet or disease are reflected in disharmonic, retarded, and occasionally accelerated physical, mental, and sexual development.

REFERENCES

Shtefko, V. G. “Vvedenie v izuchenie anatomo-biologicheskikh osobennostei pubertatnogo vozrasta.” In Osnovy vozrastnoi morfologii. Moscow, 1933.
Lebedinskaia, K. S. Psikhicheskie narusheniia u detei s patologiei tempa polovogo sozrevaniia. Moscow, 1969.
Sal’nikova, G. P. Fizicheskoe razvitie shkol’nikov. Moscow, 1968.
Solov’eva, V. S. “Uroven’ polovogo sozrevaniia kak odin iz pokazatelei biologicheskogo vozrasta organizma podrostka i aspekty ego primeneniia.” In Host i razvitie rebenka. Moscow, 1973. Pages 152–88.
Donovan, B. T., and J. J. van der Werff ten Bosch. Fiziologiia polovogo razvitiia. Moscow, 1974. (Translated from English.)
Tanner, J. M. Growth at Adolescence, 2nd ed. Oxford, 1962.

G. S. VASIL’CHENKO

puberty

[′pyü·bərd·ē]
(physiology)
The period at which the generative organs become capable of exercising the function of reproduction; signalized in the boy by a change of voice and discharge of semen, in the girl by the appearance of the menses.

puberty

the period at the beginning of adolescence when the sex glands become functional and the secondary sexual characteristics emerge
References in periodicals archive ?
The majority of the patients in the SV group presented with precocious puberty.
11-[beta]-hydroxylase deficiency is a rare disorder and must be considered in patients with precocious puberty and secondly presented with hypertension.
Lai, "A case of X-linked adrenal hypoplasia congenita, central precocious puberty and absence of the DAX-1 gene: implications for pubertal regulation," Hormone Research, vol.
Exclusion criteria included: (1) Congenital hypothyroidism; (2) Peripheral precocious puberty: Germ cell tumors and various types of gonadal tumors; (3) Organic diseases including congenital adrenal hyperplasia, adrenal tumors, various intracranial tumors; (4) Precocious puberty resulted by central nervous system diseases; (5) Exogenous precocious puberty, such as medicines, hormones, or pollute; (6) Patient who had used corticosteroid within 3 months before enrollment; (7) ICPP patient who had used GnRHa.
McCune Albright syndrome may lead to pituitary micro or macroadenomas and related excessive secretion of GH and/or prolactin, acromegaly due to severe FD, unilateral or bilateral macroorchidism and rarely a clinical picture of precocious puberty secondary to sulphatase activity.
Forty-four percent of the girls who underwent precocious puberty had serum 25-hydroxyvitamin D levels that were classified as severely deficient at less than 10 ng/mL in comparison with 21% of the normal group.
Osteodystrophia fibrosa: report of a case in which the condition was combined with precocious puberty, pathologic pigmentation of the skin and hyperthyroidism, a review of the literature.
There was no precocious puberty, cutaneous pigmentary changes, or family history of polyposis or colonic carcinoma.
In girls, early puberty or precocious puberty is defined as the development of secondary sexual characteristics, such as the development of breasts or pubic hair before the age of 8 years.
Endometriosis, precocious puberty being other areas of negative EDC effects, EDCs also has adverse effects on neurological development, neuroendocrine function, and behavior.
In rodents, NPY in the stalk-median eminence is highly stimulatory to GnRH release, and injection with NPY into the 3rd ventricle of peripubertal female rats induced precocious puberty accompanied with elevated LH levels (Minami et al.
Researchers fear that the fingerprints of these chemicals are all over the modern plagues of cancers, learning disabilities in children, precocious puberty in girls and other conditions that have seemingly sprung out of nowhere in recent decades to afflict so many of us.