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PubMed · 1119632

Shifting age-parity distribution of births and the decrease in infant mortality.

N M Morris·J R Udry·C L Chase
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Birth OrderBirth RateChild Health ServicesFamily Planning ServicesFemaleHumansInfantInfant MortalityInfant, NewbornMaternal AgeMaternal Health ServicesParityPregnancyStatistics as TopicUnited StatesJournal ArticleResearch Support, U.S. Gov't, Non-P.H.S.

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N M Morris, J R Udry, C L Chase. 1975. Shifting age-parity distribution of births and the decrease in infant mortality.. https://doi.org/10.2105/ajph.65.4.359

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The influence of presentation and method of delivery on neonatal mortality and infant neurodevelopmental outcome in nondiscordant low-birthweight ( < 2500 g) twin gestations.

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Birth Order has been described as a variable with a complex relationship to child and adult outcomes. A review of the medical literature over the past 5 years identified 20 studies that investigated the relationship between Birth Order and a health outcome. Only one of the studies established a relationship between Birth Order and a health outcome: third and fourth-born children have a higher incidence of accidents that result in hospitalization. The other demonstrated relationships are each explained by intervening variables or methodological limitations. Although Birth Order is not a strongly independent explanatory factor in understanding health outcomes, it is an important marker variable. Statistically significant relationships between Birth Order and health outcomes yield insights into the ways a family influences an individual's health.

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