Minipuberty of human infancy – A window of opportunity to evaluate hypogonadism and differences of sex development? [PDF]
Annals of Pediatric Endocrinology & Metabolism, 2020 Activation of the hypothalamic-pituitary-gonadal (HPG) axis happens in 3 phases during life. The first phase is during fetal life and is only separated from the second phase, called minipuberty, by the high concentration of placental hormones at birth ...
Christoffer Højrup Renault +5 more
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Assessment of gonadal maturation by evaluation of spermaturia. [PDF]
Archives of Disease in Childhood, 1990 The urinary excretion of spermatozoa (spermaturia) reflects the achievement of exocrine testis function during male puberty. In order to test the sensitivity and practicability of repetitive urine sampling, we analysed the sediments of 1160 first morning urine specimens obtained on successive days from 129 healthy schoolboys aged 10.1 to 17.8 years for
F, Schaefer +4 more
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Testicular growth and comb and wattles development in three Italian chicken genotypes reared under free range conditions [PDF]
, 2015 Male chickens belonging to three Italian purebreds \u2013 Ermellinata di Rovigo (ER), Robusta lionata (RL) and Robusta maculata (RM) \u2013 were studied. All the birds were reared under the same rearing conditions (from May until autumn).
DE FASSI NEGRELLI RIZZI, Chiara +1 more
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Maturation of the pituitary--gonadal system in the male rat [PDF]
Reproduction, 1978 Serum FSH and testosterone concentrations reached maximum levels between 35 and 45 days of age, which coincided with the appearance of mature spermatozoa in the majority of seminiferous tubules. Spermatozoa were not observed in sections of the urethra until the age of 46 days.
B E, Piacsek, M P, Goodspeed
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Comparative analysis of the reproductive activity of Leporinus piau (Characiformes: Anostomidae) in lentic and lotic environments [PDF]
Neotropical Ichthyology, 2020 In this study, we determined the main reproductive parameters of piau gordura, Leporinus piau, in two sections of the São Francisco River basin. Between May 2015 and April 2016, a total of 573 specimens were captured from a lentic environment (section 1),
Aline Virtude do Nascimento +5 more
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Duplicated membrane estrogen receptors in the European sea bass (Dicentrarchus labrax): Phylogeny, expression and regulation throughout the reproductive cycle [PDF]
, 2018 The numerous estrogen functions reported across vertebrates have been classically explained by their binding to specific transcription factors, the nuclear estrogen receptors (ERs).
Alvarado, M. Victoria +5 more
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Frontiers in Environmental Science, 2022 Amur ide (Leuciscus waleckii) lives in alkali-saline water (pH = 9.6) in the Lake Dali and spawns in freshwater rivers after migration annually. During spawning migrations, Amur ide not only experience osmoregulation modification from alkali-saline water
Shuangyi Wang +12 more
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Mutational analysis of DAX1 in patients with hypogonadotropic hypogonadism or pubertal delay [PDF]
, 1999 Although delayed puberty is relatively common and often familial, its molecular and pathophysiologic basis is poorly understood. In contrast, the molecular mechanisms underlying some forms of hypogonadotropic hypogonadism (HH) are clearer, following the ...
Achermann, JC +12 more
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Action of the Metalloproteinases in Gonadal Remodeling during Sex Reversal in the Sequential Hermaphroditism of the Teleostei Fish Synbranchus marmoratus (Synbranchiformes: Synbranchidae) [PDF]
, 2018 Teleostei present great plasticity regarding sex change. During sex reversal, the whole gonadincluding the germinal epithelium undergoes significant changes, remodeling, and neoformation.However, there is no information on the changes that occur within ...
Antoneli, Fernanda +3 more
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Jurnal Medik VeterinerBarred loach Nemacheilus fasciatus are unable to reproduce naturally in captivity due to the lack of environmental cues and gonadal maturation occurs slower than in the wild.
Darmawan Setia Budi +5 more
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