In high sex ratio communities, women were more likely to have multiple sex partners and men were more likely to delay first sexual intercourse and purchase sex. Only two studies included STD outcomes. Conclusions High community sex ratios were associated with increased individual sexual risk behavior...
摘要: Background: We recently demonstrated that dwarf male plants are much more common among mosses than hitherto thought. Dwarf plants, producing functional male sexual organs occur in 1020% of the moss species worldwide.关键词:Andoa bryophyte gender ratio Isothecium Macaronesia male dwarfism My...
This study investigated, through large-scale statistical analysis of the global population, whether the human sex ratio is skewing worldwide, and if so, why and how it shifts, and the impact of any shift on human reproduction. A significant imbalance of the sex ratio was observed in the whol...
The male-female ratio at birth (M/F: male births divided by total births) is anticipated to approximate 0.515. This has been shown to be declining in industrialised countries and to be displaying a latitude gradient in Europe, with more males born in warmer, southern climates. Annual national...
The sex ratio of Indias population has been on the declining course during the last one century currently indicating a massive deficit of females. Sex ratio trends vary considerably across the regions of India consistent with the degree of gender inequalities in education employment and empowerment in...
RESULTS: In the richer countries of the world, the male:female mortality ratio has been widening for all years of age, particularly for those born from 1942 onwards. Specific cohort effects are clearly identifiable. CONCLUSION: Analysis of the emergent trends suggests that economic activity, status...
TB prevalence among men was over twice as high as among women and was substantially higher even in settings with high HIV prevalence. Case notification rates were also higher for men, and the ratio of prevalent-to-notified cases of TB—an indication of how long patients take to be diagnosed...
In the absence of manipulation, both the sex ratio at birth and the population sex ratio are remarkably constant in human populations. Small alterations do occur naturally; for example, a small excess of male births has been reported to occur during and after war. The tradition of son preferen...
We demonstrated the existence of a size threshold for individuals molting into soldiers, resulting in the acquisition of soldiers of only one sex in species exhibiting strong SSD. In species exhibiting weak SSD, the size threshold skews the sex ratio of soldiers, but does not necessarily cause ...
There was either no, or borderline significance in the association between having one or more diseases/conditions and active community engagement for both sexes. These associations were limited by depression (odds ratio [OR] reduced by 15-17% for men, and by 8-11% for women), and only ...