The impact of demographic characteristics, phase of the menstrual cycle, use of hormonal contraceptives, and concomitant lower genital-tract infections on cervicovaginal inflammatory cells was assessed in 967 women, 654 of whom were infected with human immunodeficiency virus type 1 (HIV-1). Cervicovaginal lavage (CVL) fluid was evaluated for total white blood cell (WBC), polymorphonuclear leukocyte, and monocyte counts. HIV-1 infection was not associated with statistically significant differences in numbers of inflammatory cells in CVL fluid except in 1 group--HIV-1-infected women with Chlamydia trachomatis infection had a 0.43 log(10) higher WBC count than their HIV-uninfected, chlamydia-positive counterparts (P=.04). Younger age and use of progesterone-based hormonal contraceptives were independently associated with increased numbers of inflammatory cells in CVL fluid. A 0.15-0.2 log(10) increase in inflammatory cells was seen in black versus white and Hispanic women after adjustment for known potential confounders. Progesterone-based contraceptives, younger age, and race have an independent effect on cervicovaginal inflammatory cells.