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In Brief Using data from the 2006–2010 National Survey of Family Growth, we found that lifetime number of vaginal sex partners is positively associated with the number of sex partners in the past 12 months and negatively associated with age at first vaginal intercourse among 15- to 44-year-old male and female respondents. Recent sexual behavioral data are examined by lifetime number of vaginal sex partners, age, and sex for the United States from 2006 to 2010.
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Haderxhanaj et al. (2014) studied this question.
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