نتایج جستجو برای: reproductive wast age
تعداد نتایج: 835272 فیلتر نتایج به سال:
BACKGROUND In Tanzania, teenage pregnancy rates are still high despite the efforts being made to reduce them. Not enough is known about how adolescents experience and cope with sexuality and teenage pregnancy. Over the past few decades, most studies have focused on vulnerability and risk among youth. The concept of 'reproductive resilience' is a new way of looking at teenage pregnancy. It shift...
Human life history contains a series of paradoxes not easily explained by classical life history theory. Although overall reproductive output is higher than in related primates, juvenile growth is slower and age-specific reproductive rates decline faster with age. A simple energetic model would predict that growth and reproductive rates should be positively correlated and that reproductive effo...
Life-history theory predicts that investment in reproduction should increase as future reproductive potential (i.e., residual value [RRV]) decreases. Researchers have thus intuitively used age a proxy for RRV and assume decreases with when interpreting age-specific investment. Yet is an imperfect may even be poor correlate some systems. We 31-year study of the nesting ecology painted turtles (C...
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