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Advanced Search Abstract The authors examined the relation between age at first vaginal intercourse and a positive nucleic acid amplification test for sexually transmitted infection STI. A nationally representative sample of 9, respondents aged 18—26 years was tested for chlamydial infection, gonorrhea, and trichomoniasis in wave 3 — of the National Longitudinal Study of Adolescent Health. The authors used multiple logistic regression to assess the relation between age at first sexual intercourse and these STIs and to examine variation by current age, sex, race, and ethnicity. Younger ages at first intercourse were associated with higher odds of STI in comparison with older ages, but the effect diminished with increasing current age. Thus, earlier initiation of sexual intercourse is strongly associated with STIs for older adolescents but not for young adults over age 23 years.Read on for real answers and advice on hooking up, your first time, For some girls, there's no pain whatsoever; for others, sex can be uncomfortable. when the hymen stretches or tears, which can cause a little bleeding. Young women and teen girls trying to figure out the right age to young people in the United States have sex for the first time at about age Despite the controversies surrounding first-time sex, most young people in the United States become sexually active well before adulthood. According to a ...the end of the story look at the video above ↑ ↑ ↑
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