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Fitness benefits of prolonged post-reproductive lifespan in women
Most animals reproduce until they die, but in humans, females can survive long after ceasing reproduction. In theory, a prolonged post-reproductive lifespan will evolve when females can gain greaterExpand
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Sons Reduced Maternal Longevity in Preindustrial Humans
ilies. To focus on the long-term effects, we included only postmenopausal women, i.e., women who lived to over 50 years of age, in our analyses. We found that maternal longevity was not related toExpand
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Temperature-related birth sex ratio bias in historical Sami: warm years bring more sons
The birth sex ratio of vertebrates with chromosomal sex determination has been shown to respond to environmental variability, such as temperature. However, in humans the few previous studies onExpand
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Evolutionary ecology of human birth sex ratio under the compound influence of climate change, famine, economic crises and wars.
1. Human sex ratio at birth at the population level has been suggested to vary according to exogenous stressors such as wars, ambient temperature, ecological disasters and economic crises, but theirExpand
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Are reproductive and somatic senescence coupled in humans? Late, but not early, reproduction correlated with longevity in historical Sami women
Evolutionary theory of senescence emphasizes the importance of intense selection on early reproduction owing to the declining force of natural selection with age that constrains lifespan. In humans,Expand
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Carotenoid Composition of Invertebrates Consumed by Two Insectivorous Bird Species
Dietary carotenoids are important pigments, antioxidants, and immune-stimulants for birds. Despite recent interest in carotenoids in bird ecology, we know surprisingly little about the carotenoidExpand
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Does second‐to‐fourth digit length ratio (2D:4D) predict age at menarche in women?
  • S. Helle
  • Medicine
  • American journal of human biology : the official…
  • 1 May 2010
Prenatal steroid levels, estimated as the ratio of second‐to‐fourth digit length (2D:4D), have been related to reproductive success in women, but direct associations between 2D:4D and physiologicalExpand
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Digit ratios have poor indicator value in a wild bird population
Early androgen exposure is known to have long-lasting effects on phenotype, behaviour and even fitness, but difficulties in measuring the exposure hinders the study of its importance in evolutionaryExpand
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Female field voles with high testosterone and glucose levels produce male-biased litters
The proximate physiological mechanisms producing the parental ability to vary offspring sex ratio in many vertebrates remain elusive. Recently, high concentrations of maternal testosterone andExpand
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A trade-off between having many sons and shorter maternal post-reproductive survival in pre-industrial Finland
A bias in reproduction towards sons, which are energetically more costly than daughters, has been suggested to shorten parental lifespan, but previous results have been mixed. Reproductive costsExpand
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