BACKGROUND In welfare institutions, it is essential to address the health-related needs of adolescent populations who often engage in sexual activities. This study examines the association between individual and interpersonal factors concerning sexual risk behaviour (SRB) among adolescents in welfare institutions in Malaysia. METHODS Data were derived from a cross-sectional study of 1082 adol...

The reproductive biology and the gonadal development cycle of the Neotropical cichlid fish, Crenicichla menezesi, is described. This species exhibits sexual dimorphism only during the spawning season. First sexual maturity of females is attained earlier than the males. Both macroscopic and histological investigations of ovaries and testes revealed four stages of gonadal maturation. Mean batch f...

Classic ecological theory predicts that the evolution of sexual dimorphism constrains diversification by limiting morphospace available for speciation. Alternatively, sexual selection may lead to the evolution of reproductive isolation and increased diversification. We test contrasting predictions of these hypotheses by examining the relationship between sexual dimorphism and diversification in...

OBJECTIVES We sought to understand how young bisexual women in Toronto perceive their sexual and reproductive health needs, the challenges to achieving those needs, and the factors contributing both positively and negatively to their sexual and reproductive health. METHODS We conducted a community-based research project that included an advisory committee of young bisexual women, academic par...

Gymnocladus assamicus is a critically endangered tree species endemic to Northeast India, and shows sexual dimorphism with male and hermaphrodite flowers on separate trees. We studied phenology, reproductive biology and mating system of the species. The flowers are small, tubular, odorless and last for about 96 hours. Pollen grains in both morphs were viable and capable of fertilization leading...

The study aims to Describing and analyzing the actual reality of social work professional practice with village female pioneers in the field of reproductive health &Describing and analyzing the barriers that face social work professional practice in working with village female pioneers to achieve the goals of the reproductive health &Reaching a suggested perception for the social work generalis...

I assessed the reproductive patterns of captive-born and wild-caught Asian elephants managed by the Myanmar Timber Enterprise. Calving among all female elephants was seasonal with higher births in cool months (October to February) and late monsoon (September). Captive-born mothers have significantly higher fecundity rates with lower inter-birth intervals than wild-caught mothers, likely due to ...

The aim of this study was to understand gender differences in components of condom use self-efficacy to inform the design of effective reproductive health interventions for youth. Data stem from a July to August 2000 reproductive health survey among youth aged 15-24. Gender differentials in self-efficacy are analyzed using logistic regression. Perceived ability to discuss and negotiate condom u...

Vocalization behaviors of anuran amphibians are universally sexually dimorphic. Usually, only male frogs give an advertisement call, while female frog calls are limited to a soft and simple release call which is specifically suppressed at mating. In a very few species, however, female frogs also give mating vocalizations. We examined possible mechanisms for control of this rare heterotypical be...

CONTEXT In Zambia, as in many other Sub-Saharan African countries, condom use is far below the level needed to alleviate serious threats to sexual and reproductive health. It is important to understand if and how partner and relationship characteristics are independently associated with condom use within nonmarital, noncohabiting relationships. METHODS Descriptive and logistic regression anal...