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Abstract
The aim of this study was to assess the correlation between gut microbial taxonomy and various ovarian responses to controlled ovarian stimulation. A total of 22 IVF cycles with a follicle-to-oocyte index (FOI) < 0.5 and 25 IVF cycles with FOI ≥ 0.5 were included in this study. Baseline demographic characteristics were compared between the two groups. Metagenomic sequencing was performed to analyze fecal microbial community profiles. Mice were used to evaluate the effect of Bifidobacterium_longum on ovarian response to stimulation. Compared with FOI < 0.5 group, women in group with FOI ≥ 0.5 had significant more oocytes retrieved (p < 0.01). Prevotella_copri, Bateroides_vulgatus, Escherichia_coli and Bateroides_stercoris were more abundant in FOI < 0.5 group while Bifidobacterium_longum, Faecalibacterium_prausnitzii, Ruminococcus_gnavus and Bifidobacterium_pseudocatenula were more abundant in FOI ≥ 0.5 group. After adjusting for women’s age and BMI, Pearson correlation analysis indicated alteration of gut microbiome was related with serum E2, FSH, number of oocytes retrieved and clinical pregnancy rate. Animal study showed ovarian response will be improved after Bifidobacterium_longum applied. An increased abundance of Bacteroidetes and Prevotella copri, as well as a decreased abundance of Bifidobacterium longum, have been found to be associated with poor ovarian responsiveness. Changes in gut microbiomes have been observed to be correlated with certain clinical characteristics. The potential enhancement of ovarian response may be facilitated by the integration of Bifidobacterium longum.
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Details
1 The First Affiliated Hospital of Xi’an Jiaotong University, Department of Gynecology and Obstetrics, Xi’an, People’s Republic of China (GRID:grid.452438.c) (ISNI:0000 0004 1760 8119)
2 The First Affiliated Hospital of Xi’an Jiaotong University, Center for Translational Medicine, Xi’an, People’s Republic of China (GRID:grid.452438.c) (ISNI:0000 0004 1760 8119)
3 The First Affiliated Hospital of Xi’an Jiaotong University, Center for Translational Medicine, Xi’an, People’s Republic of China (GRID:grid.452438.c) (ISNI:0000 0004 1760 8119); Northwest Women’s and Children’s Hospital, The Assisted Reproductive Medicine Center, Xi’an, People’s Republic of China (GRID:grid.440257.0) (ISNI:0000 0004 1758 3118)