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Author information: Because humans have slow life histories, discussions of the optimal age at first birth have stressed venezuela teen girls benefits of delayed reproduction. However, given the diversity of ecological, fertility, and mortality environments in which humans live, reproductive maturity is expected to be highly variable.
This article uses reproductive histories to examine a pattern of early menarche and first birth among the Pume, a group of Venezuela teen girls American foragers. The objectives are first to define these patterns and then discuss their reproductive consequences.
vehezuela On average, Pume girls reach menarche at age This populational average falls several years prior to what often is considered the human norm. Two questions are then considered. What are the infant mortality costs across a venezuela teen girls reproductive career?
How does surviving fertility vary venezuela teen girls age at first birth? Given parity-specific mortality rates, the optimal strategy to minimize infant mortality and maximize reproductive span is to initiate childbearing in the midteens.
Women gain no additional advantage in surviving fertility by delaying childbearing until their late teens.