title: Age at first birth and the length of the second birth interval: is a positive relationship universal in modern populations?
abstract: "Age at first birth has been found to be positively associated with the length of the second birth interval in several studies.  One researcher has hypothesized that such a relationship would be found in any population in which contraception is widespread and women are exposed to non-maternal roles.  However, in this study a positive relationship is not found for caucasian women in Hawaii, a population in which contraception is wide-spread and women are exposed to non-maternal roles.  The findings suggest a revision of the hypothesis to accommodate more complex relationships."
mesh_terms: D000367:Age Factors; D000569:Americas; D001519:Behavior; D001721:Birth Intervals; D001723:Birth Rate; D003267:Contraception; D003268:Contraception Behavior; D003469:Culture; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D004467:Economics; D005006:Ethnicity; D005193:Family Planning Services; D005298:Fertility; D005783:Gender Identity; D006254:Hawaii; D006297:Health Services Accessibility; D008423:Maternal Age; D009656:North America; D010290:Parents; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D012106:Research; D012919:Social Behavior; D012959:Socioeconomic Factors; D014481:United States; D044465:White People; D014933:Women's Rights
keywords: Age Factors; Age Specific Fertility Rate; Americas; Behavior; Birth Intervals; Birth Rate; Contraception; Contraceptive Availability; Contraceptive Usage; Cultural Background; Demographic Analysis; Demographic Factors; Developed Countries; Developing Countries; Economic Factors; Ethnic Groups; Family Planning; Fertility; Fertility Measurements; Fertility Rate; Hawaii; Maternal Age; North America; Northern America; Parental Age; Population; Population Characteristics; Population Dynamics; Research Methodology; Sex Role; Social Behavior; Socioeconomic Factors; United States; Whites--women; Women's Status