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Onset of Puberty in MZ and DZ Twins

Published online by Cambridge University Press:  27 January 2025

Siv Fischbein
Siv Fischbein*
Affiliation:
Department of Educational Research, School of Education, Stockholm, Sweden

Abstract

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A twin study on the significance of genetic factors for the variation in peak height and peak weight velocity, as well as in age at menarche and the development of secondary sex characteristics, is presented. Evidence of a rather strong genetic regulation of the occurrence of puberty was obtained in the analysis. The maximal height or weight gain (in cm/year or kg/year) seems to be, at least in girls, less influenced by genetic factors than the age at which it appears.

Riassunto

RIASSUNTO

È stato condotto uno studio gemellare sull'importanza dei fattori genetici nella velocità d'incremento staturale e ponderale, nonché nell'età al menarca e nello sviluppo di caratteristiche sessuali secondarie. L'analisi indica un'elevata regolazione genetica della pubertà. Il massimo incremento staturale o ponderale, almeno nelle ragazze, appare essere meno geneticamente condizionato di quanto non lo sia l'età alla quale esso si verifica.

Résumé

RÉSUMÉ

Une étude gémellaire a été conduite sur l'importance des facteurs génétiques dans la vélocité maximale d'accroissement de la taille et du poids, ainsi que dans l'âge de la première menstruation et dans le développement des caractéristiques sexuelles secondaires. L'analyse indique un contrôle génétique assez élevé sur la puberté. La vélocité maximale d'accroissement, au moins chez les filles, paraît être moins génétiquement conditionnée par rapport à l'âge de son apparition.

Zusammenfassung

ZUSAMMENFASSUNG

Zwillingsforschung über die Bedeutung der Erbfaktoren für die Geschwindigkeit des Grössenwachstums und der Gewichtszunahme, sowie des Alters, in dem die Menarche auftritt und sich die sekundären Geschlechtsmerkmale entwickeln. Es ergab sich, dass zumindest bei Mädchen die Maximalwerte des Grössenwachstums und der Gewichtszunahme weniger erbbedingt sind als das diesbezügliche Alter.

Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 26 , Issue 2 , April 1977 , pp. 151 - 157
Copyright
Copyright © The International Society for Twin Studies 1977

References

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