The authors have established a relationship between intraepithelial cervical lesions and vaginal biocenotic disorders in pregnant women with human papillomavirus (HPV) infection and determined their management tactics. The HPV–positive pregnant women have a high incidence of vaginal dysbiosis (38.7%) that is, in most of them, characterized by co–infection (65%), mainly by anaerobic and aerobic infections (44.1%). High-rate HPV in the pregnant women is associated with bacterial vaginosis, mixed dysbiosis, and their recurrences and with the frequency of atypical squamous cells of undetermined significance (ASCUS) and low-grade squamous intraepithelial lesions (LSIL) in the presence of an inflammatory response. Restoring the normal microflora contributes to the disappearance of the inflammatory response and to the reduction of ASCUS. Therapy for dysbiosis does not change the rate of LSIL at 3-month follow-up. © 2018, Bionika Media Ltd.. All rights reserved.