The objectives of this protocol are: (1) To delineate factors that are important modifiable predictors of sexually transmitted infection (STI) risk in the context of increased numbers of sexual partners, comparing those participants with one sexual partner to those with 4 or more sexual partners during the past year. (2) To define the prevalence of infection with Chlamydia, gonorrhea, trichomoniasis, syphilis, genital herpes, and HIV in women reporting one sexual partner in the past year compared to women reporting 4 or more sexual partners during the past year.