The evolutionary determinants of sexual dimorphism among primates continue to be debated. This paper uses field observations ofa Malagasy primate, Propithecus uerreauxi, to argue that one problem underlying this debate is the unrecognized heterogeneity of mating system categories used in comparative analyses investigating the importance of sexual selection in determining sexual dimorphism. It i...

The persistence of sexual reproduction is a classic problem in evolutionary biology. The problem stems from the fact that, all else equal, asexual lineages should rapidly replace coexisting sexual individuals due to the cost of producing males in sexual populations. One possible countervailing advantage to sexual reproduction is that, on average, outcrossed offspring are more resistant than com...

We present the British Association of Sexual Health and HIV (BASHH) special interest group in sexual dysfunction recommendations for the management of retarded ejaculation. The recommendations outline the physiology, prevalence, definitions, aetiological factors and patient assessment for this sexual problem. We suggest treatment strategies, recommendations for management and an auditable outcome.

We present the British Association for Sexual Health and HIV (BASHH), Special Interest Group for Sexual Dysfunction updated recommendations for the management of premature ejaculation. The recommendations outline the physiology, prevalence, definitions, aetiological factors and patient assessment for this common sexual problem. Behavioural, local and systemic pharmacological treatments are disc...

OBJECTIVE The aim of this study was to describe the normative development of the electrophysiological response to auditory and visual novelty in children living in rural Kenya. METHODS We examined event-related potentials (ERPs) elicited by novel auditory and visual stimuli in 178 normally-developing children aged 4-12 years (86 boys, mean 6.7 years, SD 1.8 years and 92 girls, mean 6.6 years,...

child abuse is a recognized public health and social problem worldwide. according to the world health organization (who), child abuse includes all forms of physical and/or emotional ill-treatment, sexual abuse, neglect and negligent treatment and exploitation. child maltreatment is a global problem with serious life-long consequences. in spite of recent national surveys in several low- and midd...

We present the British Association for Sexual Health and HIV (BASHH) Special Interest Group for Sexual Dysfunction recommendations for the management of vaginismus. The recommendations outline the history, prevalence, aetiological factors, patient assessment and management for this sexual problem. Treatment strategies are discussed along with general recommendations and auditable outcomes.

background & aim: one of the most important events in human life is marriage. sexual satisfaction is one of the effective factors in a successful marriage. accordingly, sexual health education is necessary. sex education should be in line with the cultural, religious, and social infrastructures of the society. the aim of this study was to compare the effect of sex education with and without rel...

introduction: genetic and health factors along with ethnicity and geographic location are factors that affect the time of puberty onset. the aim of the present study was to evaluate the mean age of onset of puberty and its stages in boys of yazd. methods: this cross- sectional study with random clustering sampling method was conducted on 1018 healthy 9-16 years old male students of yazd. all ca...