BACKGROUND China is realizing increases in women engaged in premarital sex and multiple sex partner behavior. Our aim was to examine prevalence and determinants of multiple sex partner behavior among female undergraduates in China. METHODS Anonymously completed questionnaires were received from 4,769 unmarried female undergraduates, recruited using randomized cluster sampling by type of unive...

It was recently reported that female mice lacking a functional vomeronasal organ (VNO) displayed male-typical sexual behavior indiscriminately toward female and male conspecifics. These results have been cited as showing that a circuit controlling male-typical sex behavior exists in both sexes, with its activation in females being tonically inhibited by VNO signaling, independent of adult sex h...

background & aim:  the most important risk factor for one’s sexual health is high-risk sexual behavior. implementation of educational programs has been considered as one of the most crucial interventions in the prevention and treatment of these behaviors. therefore, this study aimed to determine the effect of an educational program on the knowledge and attitude of female sex workers toward prev...

When XX germ cells develop in a testis they become spermatogenic. Thus, somatic signals determine the sex of genetically female germ cells. In contrast, XY germ cells experimentally transferred to an ovary do not differentiate oogenic cells. Because such cells show some male characteristics when analyzed in adults, it was assumed that XY germ cells autonomously become spermatogenic. Recently, h...

To investigate the role of sex steroids in sex differences in the response of rats to the potent inflammatory mediator bradykinin (BK), we evaluated the effect of sex steroid manipulation on the magnitude of BK-induced synovial plasma extravasation (PE). The magnitude of BK-induced PE is markedly less in females. Ovariectomy of female rats increased BK-induced PE, and administration of 17beta-e...

This study aimed to analyze how the Brazilian Ministry of Health (MS) is implementing the Sex Reassignment Process (SRP) in the Unified Health System (SUS), through research of public domain official documents, systematization of surgery's quantitative data and analysis of meeting reports of the LGBT Health Technical Committee (CTSLGBT) of the MS. We conducted exploratory research combining qua...

PURPOSE This study assessed military healthcare providers' knowledge, clinical practice, and comfort in caring for active duty (AD) lesbian, gay, and bisexual (LGB) patients. METHODS Primary care providers at Fort Bragg, North Carolina were surveyed anonymously. RESULTS The response rate was 28% (n = 40). Almost two-thirds of the respondents felt comfortable discussing sexual health with AD...

The diversity, variability, and apparent rapid evolution of animal genitalia are a vivid focus of research in evolutionary biology, and studies exploring genitalia have dramatically increased over the past decade. These studies, however, exhibit a strong male bias, which has worsened since 2000, despite the fact that this bias has been explicitly pointed out in the past. Early critics argued th...

Thirty-eight male-to-female (M-to-F) transsexuals, 7 female-to-male (F-to-M) transsexuals, 135 nontranssexual men, and 225 nontranssexual women were assessed on the following: gender diagnosticity (GD) measures, which assessed male- vs. female-typical occupational and hobby preferences; instrumentality; expressiveness; self-ascribed masculinity; and self-ascribed femininity. M-to-F transsexuals...

Biological mechanisms leading to the development of males and females are extremely varied. In the XX/XY system, the male has an unequal pair of chromosomes, while in the ZZ/ZW system, the unequal pair is in the female. Sex can also be determined by the temperature of incubation. Recent research has focused on the identification of sex-determining genes, culminating in the demonstration that th...