Sexual selection

BACKGROUND: Women in Africa disproportionately acquire HIV-1. Understanding which women are most likely to acquire HIV-1 can guide focused prevention with pre-exposure prophylaxis (PrEP). Our objective is to identify women at highest risk of HIV-1 and estimate PrEP efficiency at different sensitivity levels. METHODS: Nationally representative data were collected from 2015-2019 from 15 population-based household surveys. This analysis included women aged 15-49 who tested HIV-1 sero-negative or had recent HIV-1...

After nearly a decade of HIV pre-exposure prophylaxis (PrEP) rollout in sub-Saharan Africa, there has been limited study of PrEP messaging in news media. We selected twenty South African newspapers with the highest circulation volumes to retrieve articles published in 2012-2021 mentioning PrEP ( N  = 249). Using inductive content analysis, we developed a structured codebook to characterise PrEP-related content and sentiments, as well as their evolution over time, in the South African press. Many articles espoused favourable attitudes towards PrEP (52%), but a sizeable fraction espoused unfavourable attitudes (11%)...

PURPOSE: This study evaluated the experiences and needs of lesbian, gay, bisexual, transgender, queer, and other sexual and gender minorities (LGBTQ+) attending medical schools in Thailand. METHOD: Medical students from 4 medical schools in Thailand were recruited in 2022. LGBTQ+ participants were selected via purposive sampling and invited for semistructured interviews. Verbatim transcripts were analyzed using reflexive thematic analysis. RESULTS: Interviews were conducted with 39 students identifying as lesbian, gay, bisexual, transgender, queer, questioning, nonbinary, asexual, or androgynous, with a mean age of 21...

Promoting sexual and reproductive health in the context of transmasculinity constitutes a new issue for health service organisation. This integrative review sought to understand the current evidence on pregnancy in transsexual men in the context of sexual and reproductive health care. From a search of the BVS, PubMed, Science Direct, Scopus, Capes, SciELO and PEPSIC databases, from 2010 to 2020, a sample of 11 articles was selected, treated by content analysis and grouped into four analytical categories: health services - positive experiences; cis heteronormative health services; implications of pregnancy for transsexual bodies; and repercussions of gender-affirming therapy and pregnancy...

In anurans, acoustic communication is the most important form of communication at the interspecific and intraspecific levels. Acoustic diagnostic features may be a potential alternative to morphometric and molecular diagnostics. Here, we assessed the variations in advertisement calls between two sympatric species, Boulenophrys leishanensis and Boulenophrys spinata , that share their breeding season and breeding sites. In addition, we investigated any potential relationships between call parameters and body size...

Vocal rhythm plays a fundamental role in sexual selection and species recognition in birds, but little is known of its genetic basis due to the confounding effect of vocal learning in model systems. Uncovering its genetic basis could facilitate identifying genes potentially important in speciation. Here we investigate the genomic underpinnings of rhythm in vocal non-learning Pogoniulus tinkerbirds using 135 individual whole genomes distributed across a southern African hybrid zone. We find rhythm speed is associated with two genes that are also known to affect human speech, Neurexin-1 and Coenzyme Q8A...

Sperm competition and cryptic female choice (CFC) are 2 significant mechanisms of postcopulatory sexual selection that greatly impact fertilization success in various species. Despite extensive research has conducted on sperm competition and the evolution of sperm traits in internal fertilization, our understanding of the female preferences in selecting sperm is still limited. Here, we aimed to investigate the characteristics of CFC in chickens by utilizing artificial insemination with mixed semen to control for variations in male fertilization success caused by female perception of male quality and mating order...

In fungi, fusion between individuals leads to localized cell death, a phenomenon termed heterokaryon incompatibility. Generally, the genes responsible for this incompatibility are observed to be under balancing selection resulting from negative frequency-dependent selection. Here, we assess this phenomenon in Aspergillus fumigatus, a human pathogenic fungus with a very low level of linkage disequilibrium as well as an extremely high crossover rate. Using complementation of auxotrophic mutations as an assay for hyphal compatibility, we screened sexual progeny for compatibility to identify genes involved in this process, called het genes...

BACKGROUND: Multifocal infantile hemangiomas (IHs) are focal cutaneous lesions affecting more than 1 anatomic site. The multifocal distribution pattern is the rarest form of IH manifestation, accounting for only 3-4% of all affected infants. This type of cutaneous IHs may be a marker for extracutaneous disease, with the liver being the most frequently affected organ. METHODS: We investigated the clinical and epidemiological characteristics of a small case series of infants with multifocal IHs presenting with different clinical patterns, all diagnosed and treated in a regional tertiary-care pediatric clinic...

In heterostylous plants, short-tongued pollinators are often ineffective/inefficient owing to the limitations imposed by a long corolla tube. However, it is unclear how disassortative pollen transfer is achieved in small flowers. We investigated the pollination pattern and floral morph variation by analyzing heterostylous syndrome, pollinator groups, and pollen deposition after a single visitation in two Limonium myrianthum populations with short-corolla-tubular small flowers. The predominant pollinators in the Hutubi population were pollen-seeking short-tongued syrphids, which can only transfer pollen between high-level sexual organs...

INTRODUCTION: There are insufficient epidemiological studies on the impact of age at first sexual intercourse (AFS) and age at first live birth (AFB) on postpartum depression (PPD) in pregnant women, and the conclusions of these studies are inconsistent. METHODS: We performed a Mendelian randomization (MR) study to determine the causal relationship between AFS or AFB and the risk of PPD. The summary data were extracted from genome-wide association study (GWAS) summary datasets...

BACKGROUND: Despite the increasing growth of female genital cosmetic procedures, the long-term effects of these procedures are not clearly understood. This study was conducted to compare the genital self-image and sexual function in women with and without female genital cosmetic procedures. METHODS: This cross-sectional study was conducted on 315 participants (210 women without a history of genital cosmetic surgery and 105 women with it) in Alborz province, Iran, from early February 2023 to mid-May 2023...

Despite a long history and seeming simplicity, testicular prosthesis is associated with a lot of unresolved issues. As new publications appear, the sharpness of the discussion around issues related to prosthetics does not tend to decrease. The review is based on publications on testicular prosthesis in adolescence and adulthood published in PubMed databases (https://www.ncbi.nlm.nih.gov/pubmed/) and Scientific Electronic Library Elibrary.ru (https://elibrary.ru/) was done. Only articles published in peer-reviewed journals were selected...

INTRODUCTION: Peyronie's disease (PD) is a common penile disorder characterized by the formation of fibrous noncompliant hard nodules in the tunica albuginea of the penis. Collagenase Clostridium histolyticum (CCH) is an injectable drug that treats PD by enzymatically degrading plaque interstitial collagen. CCH has been used in patients with varying curvature, as well as in the acute and stable phases of the disease, through a variety of treatment regimens and combinations. We carried out a systematic review and meta-analysis to assess the efficacy of CCH combination therapies for PD...

BACKGROUND: It is important to understand the sexual and reproductive health (SRH) needs of adolescents from the adolescents themselves to address their needs properly. Hence, this paper provides new knowledge on the information needs on SRH among adolescent boys and girls in selected secondary schools in Ebonyi state, southeast Nigeria. METHOD: A comparative assessment was conducted among adolescent boys and girls in public secondary schools that received a specific school-based SRH intervention (group A) and those that did not receive the intervention (group B)...

This study provides a comparative analysis of two state-of-the-art automatic mosquito pupae sex sorters currently available: the ORINNO and the WOLBAKI Biotech pupae sex separation systems, which both exploit the sexual size dimorphism of pupae. In Aedes aegypti, the WOLBAKI sex sorter and the ORINNO with a sieve mesh size of 1.050 mm achieved sex separation with female contamination rates below 1%, low pupae mortality rates and high male flight capacity. However, in Ae. albopictus, there was more variability, with female contamination rates above the 1% threshold and pupae mortality reaching 27% when using the ORINNO sorter...

BACKGROUND: Psoriasis is a chronic inflammatory dermatosis whose clinical and topographic distribution requires differential diagnosis, or the possible association with allergic contact dermatitis (ACD), requiring patch testing (PT) as part of the diagnostic procedure. OBJECTIVES: To describe the epidemiological, clinical, and allergic profile of patients with a primary or secondary diagnosis of psoriasis undergoing PT and compare them with patients with a diagnosis of ACD at the end of the diagnostic process...

BACKGROUND AND AIMS: Elevation is a major factor shaping plant populations on a global scale. At the same time, reproductive traits play a major role in plant fitness. With increasing altitude and increasingly harsh conditions, decreases in pollinator visitation rates, sexual investment, seed set, and heterozygosity (due to increased selfing) are expected. In response, selection and/or phenotypic plasticity could lead to an increase in plants' floral displays to increase their attractiveness to pollinators and compensates for the negative fitness impacts of reduced pollinator activity...

Two recently published randomized trials of doxycycline post exposure prophylaxis (PEP) have concluded that this intervention is highly effective at reducing the incidence of bacterial sexually transmitted infections (STIs) and has little or no risk of promoting the spread of antimicrobial resistance (AMR). In this perspective piece, we review four types of evidence that suggest that the risk of promoting AMR has been inadequately assessed in these studies. 1) The studies have all used proportion resistant as the outcome measure...

INTRODUCTION: Statistical data indicate a link between war and the spread of sexually transmitted infections (STIs), then it is necessary to carefully analyze the factors that directly affect the identified pattern in order to overcome this problem. Therefore, the purpose of the study was to systematically analyze the factors that influence the spread of STIs during war. METHODS: The study included all original research articles and meta-analyses on the impact of war on the spread of sexually transmitted infections that met the following eligibility criteria: (1) articles published exclusively in English; (2) articles published in the period 2013-2023; (3) studies with quantitative, qualitative or mixed design...