Tasa de Natalidad; Composición Familiar; Fertilidad; Estado Civil; Matrimonio; Modelos Económicos; Embarazo no Deseado; Proyectos de Investigación; Factores Socioeconómicos; Estadística como Asunto; Américas; Demografía; Países Desarrollados; Economía; Europa (Continente); Modelos Teóricos; América del Norte; Población; Dinámica Poblacional; Investigación; Conducta Sexual; Estados Unidos

Americas; Birth Rate; Demographic Factors; Developed Countries; Economic Factors; Economic Model; Estimation Technics; Europe; Family And Household; Family Characteristics; Family Size; Family Size, Desired; Fertility; Fertility Measurements; Fertility Rate; Fertility Surveys; Indirect Estimation Technics; Marital Status; Marriage; Marriage Duration; Measurement; Models, Theoretical; North America; Northern America; Nuptiality; Population; Population Dynamics; Pregnancy, Unwanted; Reproductive Behavior; Research Methodology; Socioeconomic Factors; United States; World Fertility Surveys