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Figure 2-3 The 50th centile of triceps and subscapular skinfolds. (Source Tanner J. Growth at Adolescence, 2nd ed. Oxford Blackwell Scientific Publications, 1962.) against age.4 The slopes of the curve at different ages are similar to those expressed by the growth of total body fat (see Chapter 13). Fat tissue exhibits an important increase during the first 9 months of postnatal life. The baby is born with a relatively small amount of body fat, about 14 , which rapidly increases to about 25 by...

Academic Press

Amsterdam London New York Oxford Paris < Tokyo Boston San Diego San Francisco Singapore Sydney This b< M> k is printed on acid-frec paper. Academic Press is an imprint of Elsevier Science. Copyright 2002. Elsevier Science (USA). All rights reserved. No pan of this publication may be reproduced or transmitted in any form or by any means, electronic or mcchanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the...

Endocrinology of Growth

Hindmarsh, M.B., M.D., F.R.C.P. Cobbold Laboratories, The Middlesex Hospital, University College, London Postnatal growth can be considered to consist of at least three distinct phases infancy, childhood, and puberty. The infancy component is largely a continuation of the longitudinal growth process observed in utero. This displays a peak growth velocity around 27-28 weeks of gestation with a decline in growth rate during the last trimester of pregnancy. Birth, in a sense, is...

Adrenal Androgens

Figure 4-2 The layers of the adult adrenal cortex and the principal steroids produced by each layer. observed to have elevated estradiol levels. These observations led some to suggest that as yet undetectable increases in ovarian estradiol production early in puberty may trigger adrenarche in girls.56 This possibility has not yet been discriminated from the alternative, that elevated estradiol is a consequence and not a cause of precocious adrenarche, nor does it provide an explanation of the...

Puberty

Department of Anthropology, Peabody Museum, Harvard University, Boston Puberty refers to the onset of adult reproductive capacity. As a milestone in human development, puberty is quite dramatic, involving a rapid transformation of anatomy, physiology, and behavior. Other than pregnancy, it is probably the most abrupt and encompassing developmental transition that human beings undergo between birth and death. It is also a transition of deep cultural significance in most societies around the...

Age Years

Figure 2-4 Correlations between adult height and height of the same individuals as children. (Source Tanner J. Growth at Adolescence, 2nd ed. Oxford Blackwell Scientific Publications, 1962.) was carried out in the 1930s by Sir John Hammond at Cambridge University.6 Using artificial insemination techniques, this research group crossed a Shetland pony mare with a Shire horse sire, and a Shire horse mare with a Shetland pony sire. Birth-weights of the foals were in accordance with maternal size....

Postnatal Growth In Human Birth To Maturity

Height Velocity Curves

Growth in Infancy and Childhood A Pediatric Approach Service of Growth and Development, Hospital Garrahan, Buenos Aires, Argentina At birth the infant is delivered into a postnatal environment characterized by extremely varied and changing conditions. He or she will be subject to intense and continuous physiological demands, which will require consequent adaptive responses during the first years of life. Growth evolving under these circumstances becomes a central subject in pediatric practice,...

D

Et al.59 found a larger sex difference in adult height D 14.2 cm , mainly due to a relatively more important adolescent gain than in the British children, whereas data for the Belgian population show, such as for the British children, a relatively larger contribution of DT to the sex differences in adult height.60 Table 3-2 shows that the decomposition of adult sex differences in sitting height is percentagewise table 3-2 Decomposition of Sexual Dimorphism in Adult Size of Height, Sitting...