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PubMed · 437160

Sequential analysis of spontaneous abortion. II. Collaborative study data show that gravidity determines a very substantial rise in risk.

A F Naylor·D Warburton
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Abstract

Evidence from more than 14,000 reproductive histories in the Collaborative Perinatal Project of the National Institute of Neurological and Communicative Disorders and Stroke indicates that the risk of spontaneous abortion increases considerably with gravidity. Maternal age, memory errors, and sampling bias related to recurrence risk do not account for the trend. Clustering, or tendency for abortions to follow one another, occurs in histories which include live births.

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Abortion, SpontaneousBlack or African AmericanBirth OrderFemaleHumansMaternal AgeParityPregnancyRecurrenceRiskWhite PeopleAbortion, InducedAge FactorsBlacksCultural BackgroundDemographic FactorsDiseasesEpidemiologic MethodsEthnic GroupsFertilityFertility MeasurementsParental AgePopulationPopulation CharacteristicsPopulation DynamicsPregnancy ComplicationsResearch MethodologyWhitesJournal ArticleResearch Support, U.S. Gov't, P.H.S.

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A F Naylor, D Warburton. 1979. Sequential analysis of spontaneous abortion. II. Collaborative study data show that gravidity determines a very substantial rise in risk.. https://pubmed.ncbi.nlm.nih.gov/437160/

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