Background: Adolescence is a critical stage of growth and development. That is associated with changes in body shape and appearance. Issues such as irregular menstrual periods, amenorrhea, and menstrual cycle are major issues in women's health. The purpose of this study was to examine the determinants of physical puberty health based on the Health Belief Model (HBM) among female adolescents. Me...

The presumptive diagnosis of constitutional delayed adolescence is difficult to substantiate. Clinical examination and routine biochemical testing are not sufficient to exclude isolated gonadotrophin deficiency. Seven males are reported who presented with delayed puberty. These patients were given 100 [±g luteinizing hormone-releasing hormone (LH-RH) intravenously, and the luteinizing hormone (...

In primates, puberty is unleashed by increased GnRH release from the hypothalamus following an interval of juvenile quiescence. GWAS implicates Zinc finger (ZNF) genes in timing human puberty. Here we show that hypothalamic expression of several ZNFs decreased in agonadal male monkeys in association with the pubertal reactivation of gonadotropin secretion. Expression of two of these ZNFs, GATAD...

During the past decades, advancement in pubertal maturation in children has been noticed worldwide. Growing evidence indicates that increasing prevalence of obesity in children is a major factor for the secular trend of earlier puberty. In girls, several epidemiologic studies suggest that earlier pubertal onset and earlier menarche might be caused by obesity. On the other hand, in boys, few res...

The onset of puberty, and specifically menstruation, is an opportune moment for reaching girls as they transition into adolescence and young womanhood. Despite the importance of this transitional period, the reproductive health community has tended to overlook the onset of menstruation and early puberty in global, national and local policy and practice in low-income countries. This paper will d...

Precocious puberty can be induced in a majority of heifers weaned early and fed a high-concentrate diet. The objective of this experiment was to determine whether induction of precocious puberty is associated with an acceleration of ovarian maturation in heifers. Crossbred Angus and Simmental heifer calves were weaned at 104 +/- 2 (n = 18; early weaned) or 208 +/- 3 (n = 10; normal-weaned, NW) ...

A new mechanism for puberty is proposed . Puberty appears to result from the interaction of two physiologic oscillators within the hypothalamus : the arcuate nucleus, which produces the gonadotropin-releasing hormone, and the suprachiasmatic nucleus, which is a master oscillator that regulates many circadian rhythms . Puberty results when the frequency of the arcuate nucleus has slowed sufficie...

Leptin, the peptide hormone product of the ob gene, regulates food intake and energy expenditure at the hypothalamic level via the long-form of the leptin receptor (Ob-Rb). Leptin also plays a key role in determining the onset of puberty, but there is controversy as to whether leptin provides a trigger for puberty or is a permissive signal. Thus, although leptin administration can advance puber...

The onset and course of puberty are under the control of the neuroendocrine system. Factors affecting the timing and regulation of the functions of this system may alter the onset and course of puberty. Several environmental endocrine disruptors (EDs) with significant influences on the normal course of puberty have been identified. Numerous animal and human studies concerning EDs have been cond...

this study was to determine the health knowledge, attitude, and practice of adolescence girls during puberty among 8th grade students in southern part of tehran in 1996-1997. it also addressed the health needs and therefore the necessary steps to be taken to promote adolescent's health.sample study consisted of 225 students, their mothers, and their teachers. each person was interviewed by a tr...