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Reproductive and Urinary Physiology Commons

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Full-Text Articles in Reproductive and Urinary Physiology

Resource Availability, Mortality And Fertility: A Path Analytic Approach To Global Life History Variation, Mark A. Caudell, Robert J. Quinlan Apr 2012

Resource Availability, Mortality And Fertility: A Path Analytic Approach To Global Life History Variation, Mark A. Caudell, Robert J. Quinlan

Human Biology Open Access Pre-Prints

Humans exhibit considerable diversity in timing and rate of reproduction. Life history theory suggests that ecological cues of resource richness and survival probabilities shape human phenotypes across populations. Populations experiencing high extrinsic mortality due to uncertainty in resources should exhibit faster life histories. Here we use a path analytic approach informed by life history theory to model the multiple pathways between resources, mortality rates, and reproductive behavior in 191 countries. Resources that account for the most variance in population mortality rates are predicted to explain the most variance in total fertility rates. Results indicate that resources (e.g., calories, sanitation, education, …


Book Review: Reproduction And Adaptation: Topics In Human Reproductive Ecology, Geoff Kushnick Phd Feb 2012

Book Review: Reproduction And Adaptation: Topics In Human Reproductive Ecology, Geoff Kushnick Phd

Human Biology Open Access Pre-Prints

Reproduction and Adaptation: Topics in Human Reproductive Ecology. Edited by C.G. Mascie-Taylor and Lyliane Rosetta. Cambridge Studies in Biological and Evolutionary Anthropology, Vol. 59. Cambridge: Cambridge University Press. 2011. 282 pp. $99.00 (hardback). ISBN 978-0-521-50963-3.


Excessive Dietary Calcium In The Disruption Of Structural And Functional Status Of Adult Male Reproductive System In Rat With Possible Mechanism, A K. Chandra, Pallav Sengupta, Haimanti Goswami, Mahitosh Sarkar Dec 2011

Excessive Dietary Calcium In The Disruption Of Structural And Functional Status Of Adult Male Reproductive System In Rat With Possible Mechanism, A K. Chandra, Pallav Sengupta, Haimanti Goswami, Mahitosh Sarkar

Pallav Sengupta, PhD

Calcium is essential for functioning of different systems including male reproduction. However, it has also been reported as chemo-castrative agent. The study has been undertaken to elucidate the effect of excessive dietary calcium on male reproductive system in animals with possible action. Adult male healthy rats fed CaCl2 at different doses (0.5 g %, 1.0 g % and 1.5 g %) in diet for 13 and 26 days to investigate reproductive parameters as well as the markers of oxidative stress. Significant alteration was found (p<0.05) in testicular and accessory sex organs weight, epididymal sperm count, testicular steroidogenic enzyme (Δ5 3β-HSD …