BACKGROUND There is evidence suggesting that first-born children and adults are anthropometrically different to later-borns. Thus, we aimed to assess whether birth order was associated with changes in growth and metabolism in childhood. METHODS We studied 312 healthy prepubertal children: 157 first-borns and 155 later-borns. Children were aged 3-10 years, born 37-41 weeks gestation, and of bi...

Mothers have many opportunities to invest in their own or their child's health and well-being during pregnancy and immediately after birth. These investments include seeking prenatal care, taking prenatal vitamins, and breastfeeding. In this paper, we investigate a potential determinant of mothers' investments that has been largely overlooked by previous research-birth order. Data are from the ...

When limited to siblings the results appear to show a definite tendency of intelligence to increase with the order of birth as far as the eighth born child. A check on the findings has been carried out by Miss Steckel of Sioux City, Iowa, in the testing of a normal population of twenty thousand school children, cases being drawn from 2,712 families, the study being limited to siblings. The resu...

The analysis of the National Child Development Study in the United Kingdom (n = 17,419) replicates some earlier findings and shows that genuine within-family data are not necessary to make the apparent birth-order effect on intelligence disappear. Birth order is not associated with intelligence in between-family data once the number of siblings is statistically controlled. The analyses support ...

Interest on the e¤ects of birth order on human capital accumulation has been reinvigorated after the publication of Black, Devereux & Salvanes (2005) (BDS, from now on) who …nd large and robust e¤ects of birth order on educational attainment with Scandinavian data. However, despite the convincing results, the underlying causal mechanisms generating this …nding remain somewhat unknown. Indeed, B...

The goal of this study was to investigate the relation of birth order to relative weight and prevalence of obesity in a group of 13-15 years old girls. In 1997, 1458 girls were examined. The height and weight measured by trained staff were recorded. Family size and birth order were obtained by a questionnaire. For the purpose of the present study, 776 and 250 girls coming from two- and three-ch...

the researchers aim was to find out the potential effects of some maternal factors such as age, educational level, occupation as well as children’s birth order on the communicative performance of preschoolers in iran. this study was conducted with 31 preschoolers selected from bahar language institute in shiraz, iran. the required data about mothers and children were gathered through a question...