Abstract

Children, at least in the United States andin Western Europe, have been growing taller and have been reaching biologic maturity at an earlier age as evidenced by available growth data for the past 100 years. This secular accelerative trend shows no sign of slackening. Possible causes for this acceleration of growth are briefly discussed; no single factor seems responsible. Finally, this secular trend would appear to be yet another but important biologic variable in planning future growth studies. Children, at least in the United States andin Western Europe, have been growing taller and have been reaching biologic maturity at an earlier age as evidenced by available growth data for the past 100 years. This secular accelerative trend shows no sign of slackening. Possible causes for this acceleration of growth are briefly discussed; no single factor seems responsible. Finally, this secular trend would appear to be yet another but important biologic variable in planning future growth studies.

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