Indication of combined medications with wide spectrum of action is more reasonable in treatment of nonspecific vaginitis in pregnants, taking into account frequency of combined infection. The objective of current research was to reveal the impact of complex antiinfective medication on quantity of lactobacillus in pregnant women with nonspecific vaginitis. 33 pregnant women at 18,34±1,46 weeks of gestation with different obstetric pathology were included into the study. According the results of clinical and laboratory examination patients with nonspecific vaginitis, undergoing complex therapy with Polygynax (neomicine sulfate 35000 ME+nistatine 100000 ME, additional substances-dimeticone, vitamins A, E,D, soya lecitine, aminoacides, phospholipids) were enrolled into the study. Clinical monitoring was made before treatment, at 3-4th day from therapy beginning and at the end of the therapy (13-14 day). Objective methods demonstrate normalization of clinical values, decrease in the microbic contamination in vaginal discharge. As a result of treatment with Polygynax normal vaginal microbiocenosis was restored in 78,8% of pregnant women.