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Reproduction in Domestic Animals, 2008
ContentsIn this review, we describe the process of sexual maturation in the bull calf. The testes of the bull grow relatively slowly until approximately 25 weeks of age and then a rapid phase of growth occurs until puberty, at 37–50 weeks of age. During the early postnatal phase of slower growth of the testis pre‐spermatogonia and some spermatogonia ...
N, Rawlings +3 more
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ContentsIn this review, we describe the process of sexual maturation in the bull calf. The testes of the bull grow relatively slowly until approximately 25 weeks of age and then a rapid phase of growth occurs until puberty, at 37–50 weeks of age. During the early postnatal phase of slower growth of the testis pre‐spermatogonia and some spermatogonia ...
N, Rawlings +3 more
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Sexual Maturation in Thai Boys
Journal of Pediatric Endocrinology and Metabolism, 2010A worldwide secular trend towards earlier onset of puberty in girls has been noted during recent years. However, the data on sexual maturation of boys are relatively scarce and normative data of sexual maturation in Thai boys are still lacking.To determine the age of secondary sexual maturation in normal Thai boys.Three hundred healthy urban boys aged ...
P, Mahachoklertwattana +5 more
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Etiologies of Sexual Maturation: A Model System Based on the Sexually Maturing Rat
1976Publisher Summary This chapter discusses the etiologies of sexual maturation based on the studies performed in postulated models in rats and children. The chapter outlines the changes in blood in luteinizing hormone (LH) and follicle-stimulating hormone (FSH) during maturation in rats and other animal models.
W D, Odell, R S, Swerdloff
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The ovary and sexual maturation of the brain
Development, 1967ABSTRACT Pfeiffer (1935, 1936) reported the induction of constant oestrus in female rats following the transplantation of testes from litter-mate males just after birth and noted that the ovaries of these animals did not contain corpora lutea. These changes remained after removal of the testis transplants.
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Diagnosis of Disorders of Sexual Maturation
Pediatric Clinics of North America, 1971A review of normal pubertal development with recent statistical findings on the timing of the events of puberty precedes a discussion of useful laboratory tests that measure hormones and their application to the differential diagnosis of disorders of sexual maturation.
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Light intensity and sexual maturity
American Journal of Physical Anthropology, 1969AbstractThere are confirmable clines, by latitude, of melanin concentration in pigmentation for man as well as other mammals and birds. This has been suggested to be, in man, a result of the importance of vitamin D synthesis which can be inhibited by darker skins in higher latitudes.
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2023
The pattern of somatic growth reflects the variable allocation of energy and materials throughout ontogeny, with direct impact on an individual’s fitness, and is therefore expected to be adaptive with regard to the different requirements of each life stage (Arendt 1997, Nylin and Gotthard 1998).
Farias, Nahuel Emiliano +2 more
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The pattern of somatic growth reflects the variable allocation of energy and materials throughout ontogeny, with direct impact on an individual’s fitness, and is therefore expected to be adaptive with regard to the different requirements of each life stage (Arendt 1997, Nylin and Gotthard 1998).
Farias, Nahuel Emiliano +2 more
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SEXUAL MATURATION IN JUVENILE HYPOTHYROIDISM
Obstetrical & Gynecological Survey, 1973N D, Barnes, A B, Hayles, R J, Ryan
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Pediatrics, 2004
To the Editor. — I read with interest the article of Sun et al1 on the timing of sexual maturation among US children that was based on data of the Third National Health Examination Survey (NHANES III).2 The authors estimated that the median age at onset of sexual maturation in boys, ie genital stage 2 (G2) according to Tanner classification, is 10.03 ...
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To the Editor. — I read with interest the article of Sun et al1 on the timing of sexual maturation among US children that was based on data of the Third National Health Examination Survey (NHANES III).2 The authors estimated that the median age at onset of sexual maturation in boys, ie genital stage 2 (G2) according to Tanner classification, is 10.03 ...
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[Sexual and biological maturation].
Anales espanoles de pediatria, 1993We have studied the physical characteristics of strength and the electrocardiographs of 291 boys, between 9 and 15 years of age, and 284 girls from 8 to 14 years old, divided into groups according to their sexual maturation stage (SMS). During this age period, children pass from SMS 1 to SMS 5.
L A, García Llop, A, Ramada Benedito
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