Probiotic effects on sexual function in women with polycystic ovary syndrome: a double blinded randomized controlled trial

BACKGROUND: Considering the presence of sexual dysfunction in patients with polycystic ovary syndrome, our aim was to provide scientific evidence studying effect of oral probiotic on sexual function in patients with PCOS treated with letrozole in an Iranian population. METHODS: This study was a double blind randomized clinical trial. Eligible women were allocated to Lactofem plus letrozole (n = 20) or letrozole (n = 20). Folic acid was prescribed to all participants in two groups during the study. In group A, Lactofem capsule was administered daily for the first month. In the second month, letrozole (2.5 mg daily from the third day of the menstrual cycle for 5 days) plus Lactofem capsule same as previous month were prescribed. In group B, letrozole administered 2.5 days from the third day of the menstrual cycle for 5 days in the second month. All questionnaires were completed by patients after the intervention (two months after the start of treatment). The Female Sexual Function Index (FSFI) and Body Image Concern Inventory (BICI) were used to assess sexual function and body satisfaction, respectively. RESULTS: There is statistically significant increase in chemical pregnancy rate (10% vs. 0%; p = 0.05) and clinical pregnancy (10% vs. 0%; p = 0.05) in Probiotic plus letrozole group compared to letrozole group after intervention. Based on our results, there was a statistically significant difference in each domain and sum score of sexual function of before and after the intervention between group (P < 0.05). Our findings have been shown, after eight weeks, the probiotic plus letrozole group had a significant improvement in the FSFI domains and sum score compared to letrozole alone group. Moreover, there are a significant improvement in mean (IQR) of body image score in probiotic group [30 (4.99) vs. 40 (4.36); P < 0.01]. CONCLUSION: The results of the current study suggests that eight weeks of administration of probiotic may improve chemical and clinical pregnancy rate, sexual function and body satisfaction in women with PCOS.