title: Demographic perspectives of aging.
mesh_terms: D000368:Aged; D000375:Aging; D005060:Europe; D005260:Female; D005298:Fertility; D006801:Humans; D008297:Male; D011153:Population; D011157:Population Dynamics; D012424:Rural Population; D012744:Sex Ratio; D012959:Socioeconomic Factors; D014505:Urban Population