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Related Experiment Videos

When does human ageing begin?

Eugene M G Milne1

  • 1School of Population and Health Sciences, University of Newcastle upon Tyne, United Kingdom. eugene.milne@nhs.net

Mechanisms of Ageing and Development
|January 18, 2006
PubMed
Summary
This summary is machine-generated.

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Human mortality

Area of Science:

  • Gerontology
  • Evolutionary Biology
  • Demography

Background:

  • Historically, the lowest human mortality rates occurred around ages 12-13, coinciding with fertility and maximal fitness.
  • Recent trends in developed nations show a shift in the mortality nadir to ages 5-9, preceding fertility (mean 12-13).
  • This shift is attributed to reduced deaths from accidents and congenital anomalies.

Purpose of the Study:

  • To challenge the assumption that the mortality nadir, fertility onset, and maximal biological fitness are synchronous.
  • To question the inference of individual aging patterns from population-level data.
  • To examine the plausibility of aging commencing at or after fertility.

Main Methods:

  • Analysis of mortality data trends in developed nations, particularly England and Wales.

Related Experiment Videos

  • Comparison of mortality nadir timing with fertility onset.
  • Conceptual examination of biological aging processes and fitness indicators.

    • Main Results:

    • The timing of the mortality nadir has significantly shifted earlier, preceding fertility.
    • The assumption of synchronicity between mortality nadir, fertility, and maximal fitness is disproven.
    • Biological aging indicators are present from conception, not just after fertility.

    Conclusions:

    • Biological aging appears to commence at or before conception, irrespective of fertility.
    • The distinction between intrinsic and extrinsic mortality is less meaningful in early life.
    • Measures of biological fitness may decline from before birth.