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The effects of maternal age and parity on birthweight: a population-based study in New York City

S MacLeod1, J L Kiely

  • 1Division of Epidemiology, Columbia University, New York, NY.

International Journal of Gynaecology and Obstetrics: the Official Organ of the International Federation of Gynaecology and Obstetrics
|February 1, 1988
PubMed

New York City birth certificates for singletons born from September 1-December 31, 1981 (N = 36,056) were analyzed using multivariate regression techniques. The effects of maternal age and parity on birthweight were assessed. There was a significant progression of birthweight with advancing age. Birthweight similarly increased from parity 1 to parity 3, but dropped markedly in the higher parity groups. On stratification by gestational age, we found that age and parity influence birthweight by affecting fetal growth rather than the length of pregnancy.

Keywords:
Age FactorsAmericasBiologyBirth WeightBody WeightComparative StudiesData AnalysisDemographic FactorsDeveloped CountriesDeveloping CountriesFertilityFertility MeasurementsFetusGestational AgeHealthMaternal AgeMaternal HealthMaternal NutritionNew YorkNorth AmericaNorthern AmericaNutritionParental AgeParityPhysiologyPopulationPopulation CharacteristicsPopulation DynamicsPregnancyReproductionResearch MethodologyResearch ReportStudiesUnited States

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