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Further Evidence of Within-Marriage Fertility Control in Pre-Transitional England.

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Demography
|June 14, 2019
PubMed
Summary

Parity, the number of births a woman has had, influences the risk of having another child. This study confirms that birth rates decline as parity increases, even after addressing statistical concerns.

Keywords:
Birth controlBirth intervalFertility limitationPreventive checkSpacing

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Area of Science:

  • Demography
  • Sociology
  • Reproductive Health

Background:

  • Assessing parity effects on fertility requires addressing couple-level fecundity heterogeneity.
  • Previous research stratified duration models to account for this, finding a decrease in next birth hazard with rising parity in historical England.

Purpose of the Study:

  • To address critiques regarding the statistical methodology used in prior analyses of parity effects.
  • To validate the robustness of findings concerning the relationship between parity and subsequent birth hazards.

Main Methods:

  • The study re-evaluates findings using duration models, specifically addressing critiques about maternal-level stratification.
  • Statistical analyses were performed to confirm the original conclusions.

Main Results:

  • The hazard of a subsequent birth demonstrably decreases with increasing parity.
  • The original finding remains robust despite methodological critiques regarding data stratification.

Conclusions:

  • The inverse relationship between parity and the hazard of a next birth is a valid demographic phenomenon.
  • Methodological choices in analyzing fertility data can impact observed parity effects, necessitating careful consideration.