نتایج جستجو برای: early puberty
تعداد نتایج: 693749 فیلتر نتایج به سال:
Menarche is first menstrual period which phase of transition from childhood to adulthood. Many studies revealed decline in age menarche. Background: There large concern over early puberty. Dairy products are considered as one the reason for puberty due presence steroid hormones. Objective: Main objective this study identify whether & dairy has any role Methods: An online cross-sectional been co...
Klinefelter syndrome (KS) is one of the most common disease entities characterized by X-chromosomal aberration causing the primary hypogonadism in adult men. Patients with KS seem to be typically characterized by tall, slender bodies with delayed puberty and hypergonadotropic hypogonadism. However, it has been known that they have a broad spectrum of phenotype ranging from almost normal externa...
CONTEXT The age of puberty has fallen over the past 130 years in industrialized, western countries, and this fall is widely referred to as the secular trend for earlier puberty. The current study was undertaken to test two evolutionary theories: (a) the reproductive system maximizes the number of offspring in response to positive environmental cues in terms of energy balance, and (b) early pube...
UNLABELLED Early puberty is frequently observed in adopted children. This randomized trial treated 30 adopted children with early puberty and short stature with either gonadotropin-releasing hormone agonist (GnRHa) alone or in combination with growth hormone (GH) for 3 y. Before the start of treatment (T1) in the trial and at discontinuation (T2) the children and their parents underwent a psych...
This article examines selected findings regarding the consequences of difference in timing of pubertal onset in order to build an explanatory model of puberty in context. We also seek to shed light on possible prevention efforts targeting adolescent risk. To date, there is substantial evidence supporting early onset effects on both internalizing and externalizing problems during the adolescent ...
Puberty is a subject that mesmerizes and ward off, stage all human progress through, puberty both extremely personal an up-to-date public issue. Most girls will commence at some phase in their schooling. In recent times early has arose as major problem due to lifestyle modifications eating habits. There deficient knowledge the community regarding habits leading puberty. So, it important impart ...
BACKGROUND The onset of puberty is first detected as an increase in pulsatile secretion of gonadotropin-releasing hormone (GnRH). Early activation of the hypothalamic-pituitary-gonadal axis results in central precocious puberty. The timing of pubertal development is driven in part by genetic factors, but only a few, rare molecular defects associated with central precocious puberty have been ide...
Premature activation of the hypothalamic-pituitary-gonadal (HPG) axis manifests as gonadotropin-dependent precocious puberty. The mechanisms behind HPG activation are complex and a clear etiology for early activation is often not elucidated. Though collectively uncommon, the neoplastic and developmental causes of gonadotropin-dependent precocious puberty are very important to consider, as a del...
The objectives of the present study were to obtain posterior densities of genetic parameters for scrotal circumference (SC), testicular volume (TV), BW, and age at puberty, to determine their correlations, and to evaluate the inclusion of these traits as selection criteria for sexual precocity in Guzerat bulls. Two-trait analyses were performed including records of SC, TV, and BW at 365, 450, 5...
During puberty, mouse mammary epithelial ducts invade the stromal mammary fat pad in a wave of branching morphogenesis to form a complex ductal tree. Using pharmacologic and genetic approaches, we find that mammary gland branching morphogenesis requires transient matrix metalloproteinase (MMP) activity for invasion and branch point selection. MMP-2, but not MMP-9, facilitates terminal end bud i...
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