نتایج جستجو برای: sexual diversity
تعداد نتایج: 302358 فیلتر نتایج به سال:
Introduction: it is necessary to pay attention to various factors affecting marital frustration in the counseling and treatment of couples with this disorder; therefore, the present study was conducted with the aim of explaining the role of sexual diversity and thrill seeking in marital frustration. Methods: The present study was a correlational descriptive study. The statistical population of...
background: sexual dysfunction in women is very common and it affects physical and mental health. several studies have been conducted in iran in order to investigate the prevalence of female sexual dysfunction. however, there is a remarkable diversity among the results. this meta-analysis was conducted to estimate the overall prevalence of female sexual dysfunction in iran. methods: internation...
Genes of the major histocompatibility complex (MHC) encode molecules that control immune recognition and are highly polymorphic in most vertebrates. The remarkable polymorphisms at MHC loci may be maintained by selection from parasites, sexual selection, or both. If asexual species show equal (or higher) levels of polymorphisms at MHC loci as sexual ones, this would mean that sexual selection i...
Background & Aims: The roots of human’s sexual responses lay in two biophysical and psychological operating systems. Sexual malfunctions of individuals may also be originated from physical or mental sources. Several variables control the sexual responses and affect health of sexual behavior. Sexual disorders also affect marriage and are considered the source of tension. The present trial aims t...
The continuous generation of genetic variation has been proposed as one of the main factors explaining the maintenance of sexual reproduction in nature. However, populations of asexual individuals may attain high levels of genetic diversity through within-lineage diversification, replicate transitions to asexuality from sexual ancestors and migration. How these mechanisms affect genetic variati...
The regeneration is one of the most important phenomena in forest ecosystems and the most important factor of development and sustainability of forests. Assessment of the regeneration is one of the best criteria for monitoring forest function stability. The aim of this study was to investigate the spatial variability of regeneration diversity and its relationship with tree species diversity in ...
One of the most pervasive ideas in the sexual selection literature is the belief that sexually selected traits almost universally exhibit positive static allometries (i.e., within a sample of conspecific adults, larger individuals have disproportionally larger traits). In this review, I show that this idea is contradicted by empirical evidence and theory. Although positive allometry is a typica...
Sexual selection, in the form of intrasexual competition and mate choice, has driven the evolution of a variety of sexual phenotypes amongst the vertebrates (Andersson, 1994). As a result, vertebrate species utilize many different approaches to acquire fertilizations. Humans and other primates show a wide range of sexual behaviors, but this range is dwarfed by the remarkable variation seen in a...
OBJECTIVE To compare the vaginal microbiota of women engaged in high-risk sexual behaviour (sex work) with women who are not engaged in high-risk sexual behaviour. Diverse vaginal microbiota, low in Lactobacillus species, like those in bacterial vaginosis (BV), are associated with increased prevalence of sexually transmitted infections (STIs) and human immunodeficiency virus (HIV) acquisition. ...
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