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February 1987, Vol 141, No. 2 >
Article | February 1987

Are Parent-Child Resemblances in Growth Sex Limited? FREE

Stanley M. Garn, PhD; Timothy V. Sullivan
Am J Dis Child. 1987;141(2):127-128. doi:10.1001/archpedi.1987.04460020017013.
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Sir.—In the recent letters on early maturity and isosexual precocity, the statement was made that "the correlation of growth between girls and their parents is higher than that observed between parents and their sons."1 Actually, boys and girls are equally affected, especially with regard to maternal maturational timing.

Having investigated mother-child resemblances in maturational timing in thousands of children of both sexes, we found that maternal maturational timing is reflected in the size of boys and girls alike. Both the sons and daughters of early-maturing mothers are advanced in ossification timing and bone age and are larger through the time of maturity.2,3 If anything, the age at menarche of the mothers has more effect on the dimensional and maturational development of the sons than on the daughters.

Of equal interest and importance is the fact that the sons of early-maturing mothers are (like the daughters) fatter at

REFERENCES

1 +
Ruvalcaba RHA:  Familial sexual precocity . AJDC 1986;;140:742.
2 +
Garn SM:  Continuities and changes in maturational timing , in Brim OG, Kagan J (eds): Constancy and Change in Human Development . Cambridge, Mass, Harvard University Press, 1980;, pp 113-162.
3 +
Garn SM, Bailey SM:  Genetics of maturational processes , in Falkner F, Tanner JM (eds): Human Growth . New York, Plenum Publishing Corp, 1978;, pp 307-330.
4 +
Garn SM, Rohmann CG:  Interaction of nutrition and genetics in the timing of growth and development . Pediatr Clin North Am 1966;;13: 353-379.

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Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

References

1 +
Ruvalcaba RHA:  Familial sexual precocity . AJDC 1986;;140:742.
2 +
Garn SM:  Continuities and changes in maturational timing , in Brim OG, Kagan J (eds): Constancy and Change in Human Development . Cambridge, Mass, Harvard University Press, 1980;, pp 113-162.
3 +
Garn SM, Bailey SM:  Genetics of maturational processes , in Falkner F, Tanner JM (eds): Human Growth . New York, Plenum Publishing Corp, 1978;, pp 307-330.
4 +
Garn SM, Rohmann CG:  Interaction of nutrition and genetics in the timing of growth and development . Pediatr Clin North Am 1966;;13: 353-379.

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