The effect of a decline in mortality on the gross reproduction rate.
D000293:Adolescent; D000328:Adult; D002489:Central America; D003364:Costa Rica; D003710:Demography; D005260:Female; D005298:Fertility; D006801:Humans; D008875:Middle Aged; D009026:Mortality; D012098:Reproduction; D013020:South America; D014687:Venezuela