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Updated: Dec 17, 2025
06:58
Frailty Assessment in an Aging Mouse Model
Published on: September 23, 2025
300
Frailty: A cost incurred by reproduction?
E H Gordon1, N M Peel2, M D Chatfield2
1Centre for Health Services Research, The University of Queensland, Brisbane, Australia. e.gordon@uq.edu.au.
Scientific Reports
|June 25, 2020
Summary
Higher parity, or number of children, is linked to increased frailty in older adults. This suggests social and behavioral factors, not just physiological costs, may drive this relationship.
Area of Science:
- Evolutionary Biology
- Gerontology
- Sociology
Background:
- Evolutionary theories of senescence suggest a trade-off between early fecundity and late survival.
- Frailty, a measure of health status, can elucidate the long-term consequences of reproduction.
Purpose of the Study:
- To investigate the association between parity and frailty in older adults.
- To explore potential physiological and socio-behavioral factors contributing to this relationship.
Main Methods:
- Analysis of data from 3,534 adults aged 65+ in the English Longitudinal Study of Ageing.
- Measurement of frailty using the Frailty Index.
- Examination of the relationship between the number of children (parity) and frailty levels.
Main Results:
- A positive correlation was observed between higher parity and increased frailty.
- This parity-frailty relationship was consistent across both sexes.
- Little evidence supported physiological costs of childbearing as the primary driver of frailty.
Conclusions:
- The study provides evidence for a parity-frailty trade-off, particularly influenced by behavioral and social factors.
- Rearing numerous children may contribute to frailty development through non-physiological pathways.
- Further research is needed to fully understand the complex interplay of reproduction, behavior, and aging health outcomes.
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