Figure 2From: Cervicovaginal fluid and semen block the microbicidal activity of hydrogen peroxide produced by vaginal lactobacilli Endogenous H 2 O 2 concentration in CVF samples measured at 0, 1, 15 or 240 minutes exposure to air following four hours hypoxic incubation (open circles), or immediately after sample collection entailing ~1 minute exposure to air (closed circles, n = 16).Back to article page