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Sexuality, Sex and Aging

Nikita Woodhead, Kelly M Hare, Alison Cree
The existence of sex differences in digit-length ratio (especially between the second and fourth digits, 2D:4D) is well established for humans from fetal life onwards, and has been linked with later performance. In rodents, the ratio is affected prenatally by exposure to androgens and estrogens, with some research suggesting an influence from sex of the neighbouring intrauterine fetus. However, the ubiquity and ontogenetic development of sexual dimorphism in digit ratios is not well established among wild amniotes...
March 15, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
Tarisai Chiyaka, Phillis Mushati, Bernadette Hensen, Sungai Chabata, James R Hargreaves, Sian Floyd, Isolde J Birdthistle, Frances M Cowan, Joanna R Busza
Young women (aged 15-24) who exchange sex for money or other support are among the highest risk groups for HIV acquisition, particularly in high prevalence settings. To prepare for introduction and evaluation of the DREAMS programme in Zimbabwe, which provides biomedical and social interventions to reduce adolescent girls' and young women's HIV vulnerability, we conducted a rapid needs assessment in 6 towns using a "social mapping" approach. In each site, we talked to adult sex workers and other key informants to identify locations where young women sell sex, followed by direct observation, group discussions and interviews...
2018: PloS One
Derek T Dangerfield, Nina T Harawa, Laramie R Smith, William L Jeffries, Lourdes Baezconde-Garbanati, Ricky Bluthenthal
Black men who have sex with men and women (BMSMW) are at high risk for HIV and other sexually transmitted infections (STIs). Despite knowing that HIV/STI risk varies by sexual positioning practices, limited data have characterized the risk profiles of BSMW. This study utilized latent class analysis (LCA) to explore BMSMW's sexual risk profiles regarding condomless sexual positioning practices. Participants were BMSMW in intervention studies in Los Angeles, Chicago, and Philadelphia. LCA was used to characterize their sexual risk profiles...
March 14, 2018: Archives of Sexual Behavior
India D Rose, Ganna Sheremenko, Catherine N Rasberry, Catherine A Lesesne, Susan N Hocevar Adkins
Schools play an integral role in creating safe, supportive environments for students, especially for sexual minority youth (SMY). Using 2016 questionnaire data from seven high schools in a Florida school district, we obtained a sample of 1,364 SMY. Logistic regressions controlling for sex (as applicable), age, grade, race/ethnicity, and school explored differences between SMY and nonsexual minority youth (non-SMY). Sex differences related to school environment perceptions and experiences related to safety, bullying, and hearing homophobic remarks were also explored...
January 1, 2018: Journal of School Nursing: the Official Publication of the National Association of School Nurses
James Matthias, Gayle Keller, Susan Cha, Craig Wilson, Thomas A Peterman
BACKGROUND: Before searching prior records, sexually transmitted disease (STD) programs use syphilis reactor grids to exclude some reactive non-treponemal test results (RNTs) based on patient age, sex, and test titer. We propose a new algorithm that starts with comparing RNTs to previous syphilis non-treponemal tests and current treponemal test results. METHODS: De-duplicated RNTs from Florida's surveillance system (2006-2015) were extracted and stratified on morbidity...
March 13, 2018: Sexually Transmitted Diseases
Matthew Quaife, Fern Terris-Prestholt, Robyn Eakle, Maria A Cabrera Escobar, Maggie Kilbourne-Brook, Mercy Mvundura, Gesine Meyer-Rath, Sinead Delany-Moretlwe, Peter Vickerman
INTRODUCTION: A number of antiretroviral HIV prevention products are efficacious in preventing HIV infection. However, the sexual and reproductive health needs of many women extend beyond HIV prevention, and research is ongoing to develop multi-purpose prevention technologies (MPTs) that offer dual HIV and pregnancy protection. We do not yet know if these products will be an efficient use of constrained health resources. In this paper, we estimate the cost-effectiveness of combinations of candidate multi-purpose prevention technologies (MPTs), in South Africa among general population women and female sex workers (FSWs)...
March 2018: Journal of the International AIDS Society
Laura Burgueño Torres, María Rosa Mourelle Martínez, Montserrat Diéguez Pérez, Joaquín M de Nova García
AIM: To analyse differences in the eruption of primary teeth between both sexes. MATERIALS AND METHODS: A cross-sectional study was performed in a sample of 1250 children aged between 3 and 42 months. The clinical emergence of teeth was taken to estimate average ages for primary teeth eruption. The t-test was used to analyse gender and arch differences. RESULTS: Eruption of primary teeth began at the same time in girls as in boys; although the eruptive process was longer in girls...
March 14, 2018: Acta Odontologica Scandinavica
Geertjan Overbeek, Daphne van de Bongardt, Laura Baams
One main source of sexual socialization lies within family interactions. Especially sexuality-specific parenting may determine adolescents' sexual development-adolescents' sexual behavior and sexual risk behavior, sexualized media consumption and permissive sexual attitudes-to a significant extent, but different ideas exist about how this works. In this longitudinal study, we examined two hypotheses on how sexuality-specific parenting-parenting aimed specifically at children's sexual attitudes and behaviors-relates to adolescents' sexual development...
March 13, 2018: Journal of Youth and Adolescence
Gu Li, Wang Ivy Wong
Single-sex schooling has been controversial for decades. The current study investigated the differences in friendships, dating, and past, present, and ideal sexual orientation, between 207 college students who attended single-sex secondary schools and 249 college students who attended coeducational secondary schools in Hong Kong, controlling for personal characteristics such as socioeconomic status. We found that, compared to graduates of coeducational schools, graduates of single-sex schools reported a different gender composition in intimate friendships favoring the same sex, less romantic involvement with other-sex close friends, older age at first date, fewer boyfriends or girlfriends, and more past same-sex sexuality...
March 13, 2018: Archives of Sexual Behavior
Richard A Crosby, Leandro Mena, Rachel Vickers Smith
The aim of this study is to determine, among young Black men who have sex with men (YBMSM), the 12-month efficacy of a single-session, clinic-based intervention promoting condom use to enhance sexual pleasure (purpose 1) and the use of condoms from the start-to-finish of anal sex (purpose 2). A pre-test, post-test randomized controlled trial was conducted, using a 12-month period of follow-up observation, in STI clinics. Data from 394 YBMSM completing baseline and 12-month follow-up assessments were analyzed...
March 9, 2018: Health Education Research
Kiffer G Card, Nathan J Lachowsky, Heather L Armstrong, Zishan Cui, Lu Wang, Paul Sereda, Jody Jollimore, Thomas L Patterson, Trevor Corneil, Robert S Hogg, Eric A Roth, David M Moore
INTRODUCTION: Among gay, bisexual, and other men who have sex with men (GBM), collinearity between polysubstance use and mental health concerns has obscured their combined effects on HIV risk with multivariable results often highlighting only one or the other. METHODS: We used mediation and moderation analyses to examine the effects of polysubstance use and depressive symptoms on high-risk sex (i.e., condomless anal sex with serodiscordant/unknown status partner) in a sample of sexually-active GBM, aged ≥16 years, recruited in Metro Vancouver using respondent driven sampling...
March 6, 2018: Addictive Behaviors
Carmen H Logie, Candice L Lys, Nicole Schott, Lisa Dias, Makenzie R Zouboules, Kayley Mackay
Scant research has addressed health and well-being among lesbian, gay, bisexual, transgender, and queer (LGBTQ) persons in the Arctic. The Northwest Territories (NWT) has among Canada's highest rates of sexually transmitted infections (STIs). LGBTQ persons in NWT are at the nexus of LGBTQ and Arctic health disparities. Yet little is known of their sexual health needs. This qualitative study explored the sexual health needs of LGBTQ persons in the NWT. We conducted semi-structured, in-depth interviews with 51 participants, including 16 LGBTQ youth aged 15-24, 21 LGBTQ adults aged 25 and above, and 14 key informants who worked with LGBTQ persons...
March 13, 2018: Global Public Health
Nathan W Burke, Russell Bonduriansky
Facultative reproductive strategies that incorporate both sexual and parthenogenetic reproduction should be optimal, yet are rarely observed in animals. Resolving this paradox requires an understanding of the economics of facultative asexuality. Recent work suggests that switching from parthenogenesis to sex can be costly and that females can resist mating to avoid switching. However, it remains unclear whether these costs and resistance behaviors are dependent on female age. We addressed these questions in the Cyclone Larry stick insect, Sipyloidea larryi , by pairing females with males (or with females as a control) in early life prior to the start of parthenogenetic reproduction, or in mid- or late life after a period of parthenogenetic oviposition...
March 2018: Ecology and Evolution
Christy L Kollath-Cattano, Emily S Mann, Estephania Moreno Zegbe, James F Thrasher
While the literature on sexual scripts is substantive, with some scholarship examining the role of popular media in the production of dominant and divergent sexual practices and interactions, limited attention has been paid to the contemporary Mexican context. In this article, we share findings from a quantitative content analysis of popular Mexican films in order to explore how sexual behavior is portrayed and more specifically how relationship characteristics, condom use, and substance use interact with representations of sexual behavior...
March 2018: Sexuality & Culture
Christian Graugaard, Cecilie Dyg Sperling, Bibi Hølge-Hazelton, Kirsten A Boisen, Gitte Stentebjerg Petersen
OBJECTIVE: The negative impact of malignant disease on sexual and relational functioning is well-documented among adults, but scarcely investigated among adolescents and young adults. This study explored the body image, self-perceived attractiveness and sexual/romantic experiences of Danes diagnosed with cancer at the age of 15-29 years. It also aimed to clarify whether self-perceived needs for counseling were in fact met by health-care providers. METHODS: All Danes who had been diagnosed with cancer at the age of 15-29 years during the period 2009-2013 were included in a cross-sectional nationwide questionnaire study...
March 12, 2018: Psycho-oncology
Yoko Miyamoto, Hiroaki Kawaguchi, Akihide Tanimoto
The aim of this study is to investigate the changes with age on morphology and sex hormone receptor expression in the mammary glands of male Sprague-Dawley rats, focusing on male-specific cells, "oxyphilic cells", observed after sexual maturity. The mammary glands of male rats at 14, 21, 35, 50, 75 and 100 days old were examined by gross observation, microscopic observation using whole mount specimens, histological and immunohistochemical sections. Grossly, mammary glands showed brown color at 50-100 days old...
March 9, 2018: Experimental Animals
Stephanie Benson, Katherine S Elkington, Cheng-Shiun Leu, Amelia Bucek, Curtis Dolezal, Patricia Warne, Claude Mellins
As youth with perinatally acquired HIV infection age, there is a need for studies that identify predictors and correlates of sexual risk behaviors. We examined the association between psychiatric disorders and substance use disorders (SUD) with sexual risk behaviors in youth with perinatally acquired HIV infection and perinatally HIV-exposed but uninfected youth. Participants were recruited from four medical centers in New York City. The Diagnostic Interview Schedule for Children and the Adolescent Sexual Behavior Assessment were administered to assess psychiatric disorders and sexual behaviors, respectively...
February 17, 2018: Journal of the Association of Nurses in AIDS Care: JANAC
Thiago Teixeira, Maira Nazima, Jorge Hallak
INTRODUCTION: The Amazon Rainforest is a cradle of biodiversity, where different ethnic groups have specific sexual habits. AIMS: To define the average sexual quality of life of Amazonian men 18 to 69 years old, evaluate the influence of aging on their sexual function, and calculate the prevalence of premature ejaculation, delayed ejaculation, and hypoactive sexual desire disorder. METHODS: A cross-sectional quantitative probability sample study was performed with a demographically representative population (N = 385), with data collected privately at participants' houses, including men who had been sexually active for a minimum of 6 months...
March 6, 2018: Sexual Medicine
Andrea Burri, Soshiro Ogata
BACKGROUND: Genetic factors have been implicated in the etiology of female sexual dysfunction. Yet, how much the dynamic nature of sexual functioning is influenced by changes in genetic and/or environmental factors remains unknown. AIM: To explore temporal stability of genetic and environmental influences on female sexual functioning over a 4-year period. METHODS: Data on desire, arousal, lubrication, orgasm, satisfaction, and pain were collected in 2009 and 2013 using the Female Sexual Function Index and were available for 1,209 British twin women...
March 6, 2018: Journal of Sexual Medicine
Audrey J Gaskins, Rajeshwari Sundaram, Germaine M Buck Louis, Jorge E Chavarro
BACKGROUND: Little is known about the predictors of sexual intercourse frequency (SIF) among couples trying to conceive despite the well-established link between SIF and fecundity. AIM: To evaluate men's and women's demographic, occupational, and lifestyle predictors of SIF among couples. METHODS: 469 Couples without a history of infertility participating in the Longitudinal Investigation of Fertility and the Environment Study (2005-2009) were followed up for ≤1 year while trying to conceive...
March 6, 2018: Journal of Sexual Medicine
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