Metrics details. 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. Anonymously completed questionnaires were received from 4, unmarried female undergraduates, recruited using randomized cluster sampling by type of university and students' major and grade. Items captured demographic, family, peer and work influence, and student factors major, academic performance, and sex-related knowledge and attitudes. Of 4, female students, Several demographic, family, peer and work influences, and student factors including major, performance, knowledge, and attitude toward sex were risk factors for ever having sex.

Multiple sex partners MSP is the measure and incidence of engaging in sexual activities with two or more people within a specific time period. Sexual activity with MSP can happen simultaneously or serially. MSP includes sexual activity between people of a different gender or the same gender. MSP can also mean that one person may have a long-term relationship or relationships, and when the second relationship begins, the person can be said to have multiple sex partners. Epidemiologists and clinicians who quantify risks associated with MSP do so to identify those who have had sexual intercourse with more than one partner in the past 12 months.

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