The purpose of the study and designing of the study performance: The effect of oral Lactofem probiotic capsule on lactobacillus colonization and some vaginal health indices during the age of 18 up to 55 years. This study has been double-blind and placebo. Inclusion criteria: The age 18-55 years; married; nonpregnant women; willing to participate in study; having natural menstrual cycles; nonsmokers; Nugent score = 4-6; pH >4.5; clinically, the samples not suffered any vaginitis; not suffered from such disease as liver, heart, kidney, diabetes, nervous system ailments, immunodeficiency, sexually transmitted illnesses; non abnormal vaginal bleedings. Exclusion criteria: pregnancy occurrence during the study; the use of vast spectrum antibiotics, hormonal drugs, alcohol, anticoagulation drugs and the recent month immunosuppressive; infection existence; ulcers, injury and abnormal secretions in the vulve, vagina and cervix examinations; sensitivity symptoms against oral probiotic; suspension with going on the study participation. Target sample size: selection of eighty individuals of the qualified study community. Random allocation of subjects into two groups. Intervention: oral probiotic is given to a group and placebo to another one. Tracking people: vaginal pH measurement, lactobacillus culture and assigning of Nugent score respectively after 10, 30, 60 and 70 days of consuming probiotic or placebo in two study groups. Outcome study: the effect of oral probiotic on the measured pH, lactobacillus culture and Nugent score.