[Demographic aging and family planning: what relationship].
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D001723:Birth Rate; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005298:Fertility; D011153:Population; D011157:Population Dynamics; D011174:Portugal
Demographic Aging; Demographic Factors; Demographic Transition; Developed Countries; Europe; Fertility; Fertility Decline; Population; Population Dynamics; Portugal; Southern Europe