OBJECTIVE Previous studies have demonstrated that early age of first sexual intercourse is associated with human papillomavirus (HPV) infection. The objective of this study was to identify a set of risk behaviors and partner characteristics that mediate the association between age of first sexual intercourse and subsequent HPV infection in adolescent and young adult women. METHODS Female univ...

background: polycystic ovary syndrome and oligomenorrhea which is one of its complications are considered as the most common causes of menstrual disorders which increases the risk of depression and psychological effects complications. the prevalence of oligomenorrhea is predicted to be 12 to 15 percent. this syndrome occurs with symptoms such as obesity, impaired glucose metabolism, dysmenorrhe...

BACKGROUND Given the higher prevalence of risky sexual behaviors and substance use, adolescents and youths are at risk for HIV. Despite its importance, however, to the best of our knowledge, there are only a few researches on risky behaviors in Chinese adolescents/youths. The present study aimed to describe the prevalence of sexual and substance use behaviors among a Chinese sample of senior hi...

OBJECTIVE This study describes the sexual behavior among students who participated in the National Adolescent School-based Health Survey (PeNSE) 2012 and investigates whether social inequalities, the use of psychoactive substances and the dissemination of information on sexual and reproductive health in school are associated with differences in behavior. METHODOLOGY The response variable was ...

PURPOSE Little is known about associations of adolescents' socio-economic status (SES) and their sexual activity and risk behaviours. This study examined these associations in Nova Scotia adolescents aged 15-19. METHODS Students at four high schools in northern Nova Scotia completed surveys examining relationships of family SES factors and: 1) sexual activity (having had vaginal or anal inter...

PURPOSE Using a genetically informed, discordant twin analysis, the objective of this study was to examine whether earlier onset of drinking and smoking behaviors predicted early sexual intercourse onset. METHODS Over 3,400 adult same-sex twins from the Australian Twin Registry completed a structured interview that included retrospective reports on onsets of smoking, drinking, intoxication, a...

This study presented and tested a model of sexual satisfaction for late adolescent girls. In this model, sexual self-concept and approach sexual motives were tested as predictors of adolescent girls’ sexual satisfaction with their most recent experience of sexual intercourse. A total of 116 girls in 12th grade (ages 16-19) completed measures of sexual self-concept and sexual experiences. A smal...

PURPOSE This paper presents the findings of a cross-sectional survey on the risk and protective factors of premarital sexual behavior among rural female adolescents in Peninsular Malaysia. METHODS We investigated data on 770 female respondents aged 13-17 years in rural areas to identify predictive factors for premarital sexual intercourse. Data were analyzed using bivariate and multivariate r...

In spite of a variety of broad-based interventions, rates of adolescent sexual intercourse remain high. Using data from a large longitudinal study, this paper provides empirical evidence of Canadian adolescent sexual activity rates by age and gender. The incidence of first sexual intercourse among those 13-15 years was higher among males than females; by ages 16-17 years, rates were the same fo...