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Adolescent coitus and infant birthweight.

E R McAnarney, C A Bayer, C F Kogut

    Journal of Adolescent Health Care : Official Publication of the Society for Adolescent Medicine
    |March 1, 1986
    PubMed
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    Nearly 80% of adolescent mothers reported sexual activity during pregnancy. While maternal factors significantly influence infant birthweight, the timing of intercourse near delivery had a minimal impact.

    Area of Science:

    • Obstetrics and Gynecology
    • Maternal-Fetal Medicine
    • Reproductive Health

    Background:

    • Sexual activity during pregnancy is common among adolescent mothers.
    • Understanding factors affecting infant birthweight is crucial for neonatal outcomes.

    Purpose of the Study:

    • To investigate the relationship between coitus during pregnancy and infant birthweight and gestational age.
    • To determine the contribution of maternal factors and timing of intercourse to birthweight variance.

    Main Methods:

    • Retrospective analysis of adolescent mothers' self-reported sexual activity during pregnancy.
    • Statistical comparison of infant birthweight and gestational age based on coitus timing.
    • Regression analysis to assess variance explained by maternal factors and coitus interval.
    Keywords:
    Adolescent PregnancyAdolescentsAdolescents, FemaleAge FactorsAmericasBehaviorBiologyBirth WeightBody WeightCoitusComparative StudiesDemographic FactorsDeveloped CountriesDeveloping CountriesFertilityGestational AgeHealthLow Birth WeightMaternal HealthNorth AmericaNorthern AmericaPhysiologyPopulationPopulation CharacteristicsPopulation DynamicsPregnancyPregnancy OutcomesReproductionReproductive BehaviorResearch MethodologyResearch ReportSex BehaviorSmokingSocial BehaviorStatistical StudiesStudiesTime FactorsUnited StatesYouth

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    Main Results:

    • 79% of adolescent mothers reported coitus during pregnancy.
    • Significant differences in mean birthweight and gestational age were observed between infants born to mothers with and without recent coitus before delivery.
    • Maternal factors explained 39% of birthweight variance, while the interval between last coitus and delivery accounted for only 1.0%.

    Conclusions:

    • While sexual activity during pregnancy is prevalent in adolescent mothers, its timing near delivery appears to have a limited direct impact on infant birthweight.
    • Pre-pregnancy weight and weight gain during pregnancy are significant predictors of infant birthweight in this population.