title: [Effect of social and biological factors on family size and the secondary sex ratio in 2 human generations in Monterey, Nueva León].
mesh_terms: D000328:Adult; D000367:Age Factors; D001722:Birth Order; D004522:Educational Status; D005191:Family Characteristics; D005193:Family Planning Services; D005260:Female; D006801:Humans; D008297:Male; D008800:Mexico; D008875:Middle Aged; D009790:Occupations; D012737:Sex Factors; D012959:Socioeconomic Factors
vernacular_title: Efecto de factores sociales y biológicos sobre el tamaño de la familia y la proporción secundaria de sexos, en dos generaciones humanas de Monterrey, Nuevo León.