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The Rate of Growth and Maturing of Twins*

Published online by Cambridge University Press:  01 August 2014

Maciej Sklad
Maciej Sklad*
Affiliation:
Laboratory of Anthropology, Academy of Physical Education, Warsaw, Poland
*
Laboratory of Anthropology, Academy of Physical Education, ul. Marymoncka 34, 01-813 Warsaw, Poland

Abstract

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In the years 1966-1976, 50 pairs of Warsaw twins (27 MZ and 23 DZ) were subjected to longitudinal investigations. The twins were aged 9-11 years at the beginning of the observations, and 19-22 at their conclusion. The observations consisted of comprehensive somatic measurements and of the evaluation of biological maturity. The rate of growth of the twins, defined by the magnitude of yearly increments of body height, proved to be more concordant in MZ than DZ pairs. The appearance of the adolescent spurt occurred in the same year in 81 % of MZ and ca. 43% of DZ pairs. A very slight relationship was found between the rate of growth and final body height. The attaining of subsequent stages of sexual maturity in MZ twins was concordant in 88%, and in DZ twins in 30-39%, according to the respective stage. The body height curves were represented be means of three numerical parameters.

Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 26 , Issue 3-4 , October 1977 , pp. 221 - 237
Copyright
Copyright © The International Society for Twin Studies 1977

Footnotes

*

The research was financed by the Section of Natural Science of the Polish Academy of Sciences.

References

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