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Death, Hope, and Sex: Life-History Theory and the Development of Reproductive Strategies [and Comments and Reply]
Many social scientists reject evolutionary views of human behavior because of their supposed genetic determinism. To establish that not all evolutionary models are inherently deterministic the authorExpand
Energetics and reproductive effort
  • P. Ellison
  • Biology, Medicine
  • American journal of human biology : the official…
  • 1 May 2003
New evidence is found that variation in testosterone production in response to both age and longer‐lasting energetic conditions contributes to the modulation of somatic and behavioral aspects of male reproductive effort, aspects that are more energetically costly for a male. Expand
Large breasts and narrow waists indicate high reproductive potential in women
It is documented that women with higher breast–to–underbreast ratio (large breasts) and women with relatively low WHR (narrow waists) have higher fecundity as assessed by precise measurements of daily levels of 17–β–oestradiol (E2) and progesterone. Expand
Marriage and fatherhood are associated with lower testosterone in males
Abstract In order to study the hormonal correlates of the tradeoff between mating and parenting effort in human males, we examined the salivary testosterone (T) levels of 58 Boston-area men who wereExpand
Metabolic hypothesis for human altriciality
Evidence is presented that challenges the importance of pelvic morphology and mechanics in the evolution of human gestation and altriciality and suggests that limits to maternal metabolism are the primary constraints on human gestation length and fetal growth. Expand
Testosterone and paternal care in East African foragers and pastoralists
Comparisons between two neighbouring Tanzanian groups that exhibit divergent styles of paternal involvement confirmed the hypothesis that paternal care is associated with decreased testosterone production in men, and added further support to the ‘challenge hypothesis’. Expand
The relationship of male testosterone to components of mental rotation
The results suggest that T may facilitate male performance on MRTs by affecting cognitive processes unrelated to changing the orientation of imagined objects; including encoding stimuli, initiating the transformation processes, making a comparison and decision, or producing a response. Expand
Human Ovarian Function and Reproductive Ecology: New Hypotheses
8 hypotheses based on recent research are proposed relating the response of human ovarian function to ecological factors to gain a systhesis of ovarian physiology based on evolutionary theory, which provides an indication of chronic environmental qualities especially energy supply. Expand
The development of sex differences in digital formula from infancy in the Fels Longitudinal Study
This is the first study using long-term serial data to evaluate the validity of finger length ratios as markers and finds that sex differences in the fingers of children are highly correlated with adult finger length ratio. Expand
Population variation in age-related decline in male salivary testosterone.
Age patterns of testosterone decline vary between populations primarily as a result of variation in the peak levels attained in young adulthood. Expand