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American paternal age data for selected years from 1876 to 1981
1Department of Medicine, Baylor College of Medicine, Houston, Tex.
Neurofibromatosis
|January 1, 1988
Summary
Mean paternal age significantly decreased between 1876 and 1981, dropping from 36.9 to 28.5 years. This trend reflects a shift towards younger fathers having more children.
Area of Science:
- Demography
- Reproductive Health
- Sociology
Background:
- Historical trends in paternal age are crucial for understanding demographic shifts.
- Changes in fatherhood age can impact family structures and societal norms.
- Longitudinal data on paternal age provides insights into reproductive patterns over time.
Purpose of the Study:
- To document and analyze changes in mean average paternal ages from 1876 to 1981.
- To illustrate the methodologies used for calculating mean paternal age.
- To identify factors contributing to observed shifts in paternal age at childbirth.
Main Methods:
- Compilation of data for selected years within the 1876-1981 period.
- Calculation of mean average paternal ages.
- Analysis of birth statistics based on father's age groups.
Main Results:
- Mean paternal age declined substantially from 36.9 years to 28.5 years by 1981.
- A decrease in births to older fathers was observed.
- An increase in births to younger fathers was documented.
Conclusions:
- The study highlights a significant generational shift in paternal age over a century.
- Demographic changes are driven by both absolute and relative shifts in births across paternal age groups.
- Findings underscore evolving societal patterns related to fatherhood and family planning.