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[Demographic trends: birth spacing].

N A Vargas, S Valenzuela, B Larrea

    Revista Medica De Chile
    |April 1, 1989
    PubMed
    Summary
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    This study on child spacing in Santiago found that longer intervals between births increased significantly. Despite contraceptive use, many pregnancies occurred, though less frequently with longer birth spacing.

    Area of Science:

    • Reproductive Health
    • Demography
    • Public Health

    Background:

    • Child spacing is a critical factor in maternal and child health outcomes.
    • Understanding birth intervals is essential for family planning and population studies.
    • Previous research indicates variations in child spacing across different socioeconomic groups.

    Purpose of the Study:

    • To compare child spacing patterns in western metropolitan Santiago between two study periods (1984-85 and 1988).
    • To analyze the relationship between birth spacing, socioeconomic factors, and contraceptive use.
    • To assess trends in long and short birth intervals.

    Main Methods:

    • Comparative analysis of two cross-sectional studies involving mothers from state-financed hospitals serving medium and low-income populations.
    Keywords:
    AmericasBiologyBirth Intervals--changesBirth SpacingBirth WeightBody WeightChileContraceptionContraception FailureContraceptive UsageDemographic FactorsDeveloping CountriesEconomic FactorsFamily PlanningFertilityFertility MeasurementsFertility SurveysLatin AmericaLow Income PopulationMiddle Income PopulationPhysiologyPopulationPopulation CharacteristicsPopulation DynamicsPostpartum WomenPuerperiumReproductionSocial ClassSocioeconomic FactorsSocioeconomic StatusSouth AmericaUrban Population

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  • Data collection through surveys of 687 mothers in the first study and 1,000 mothers in the second.
  • Analysis of birth spacing, birth weights, and self-reported contraceptive use.

    • Main Results:

    • Longer child spacing (≥5 years) increased significantly from 33.8% to 40.1% between the two study periods.
    • Short spacing (<2 years) showed a slight, non-significant increase from 19.2% to 21.8%.
    • High rates of unintended pregnancies were observed (19.7% to 22.5%), with lower rates associated with longer birth intervals.

    Conclusions:

    • Child spacing patterns in Santiago shifted towards longer intervals over the study period.
    • Contraceptive failure remains a significant issue, impacting unintended pregnancies.
    • Longer birth spacing may be associated with more effective family planning outcomes.