title: [Preliminary inquiry into the difference in sex ratio at birth in China].
mesh_terms: D001208:Asia; D001519:Behavior; D001723:Birth Rate; D002681:China; D003469:Culture; D003710:Demography; D003906:Developing Countries; D004467:Economics; D005006:Ethnicity; D005202:Asia, Eastern; D005298:Fertility; D005783:Gender Identity; D005843:Geography; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D012106:Research; D012107:Research Design; D012424:Rural Population; D012919:Social Behavior; D012959:Socioeconomic Factors; D014505:Urban Population
keywords: Asia; Behavior; Birth Rate; China; Cultural Background; Demographic Factors; Developing Countries; Eastern Asia; Economic Factors; Ethnic Groups; Fertility; Fertility Measurements; Geographic Factors; Macroeconomic Factors; Measurement; Population; Population Characteristics; Population Dynamics; Research Methodology; Rural Population; Sex Role; Social Behavior; Socioeconomic Factors; Spatial Distribution; Urban Population