Vaginal Dysbiosis in Infertility: A Comparative Analysis Between Women with Primary and Secondary Infertility

Infertility, both primary and secondary, is strongly influenced by microbiological factors, with the vaginal microbiota playing a key role in reproductive health. Objective: The aim of this study was to characterize the vaginal microbiota of 136 Mexican women diagnosed with infertility—primary (n =...

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Main Authors: Iliana Alejandra Cortés-Ortíz, Gustavo Acosta-Altamirano, Rafael Nambo-Venegas, Jesús Alejandro Pineda-Migranas, Oscar Giovanni Ríos-Hernández, Eduardo García-Moncada, Alejandra Yareth Bonilla-Cortés, Mónica Sierra-Martínez, Juan Carlos Bravata-Alcántara
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Microorganisms
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Online Access:https://www.mdpi.com/2076-2607/13/1/188
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Summary:Infertility, both primary and secondary, is strongly influenced by microbiological factors, with the vaginal microbiota playing a key role in reproductive health. Objective: The aim of this study was to characterize the vaginal microbiota of 136 Mexican women diagnosed with infertility—primary (n = 58) and secondary (n = 78)—by evaluating the presence of pathogenic bacterial species and their associations with infertility conditions. Methods: Samples were obtained through cervical swabs, and microorganism identification was performed using qPCR techniques. Results: Analysis revealed a positive correlation between increased age and the likelihood of primary infertility, as well as a negative correlation with secondary infertility. Significant differences in microbial composition were also observed between the two infertility groups. <i>Lactobacillus crispatus</i> and <i>Lactobacillus gasseri</i> were dominant in women with primary infertility, in addition to a high prevalence of <i>Gardnerella vaginalis</i> and <i>Fannyhessea vaginae</i>. Additionally, correlations were found between the presence of human papillomavirus (HPV) and sexually transmitted bacteria, as well as <i>Gardnerella vaginalis</i>. Conclusion: Our findings suggest that the composition of the vaginal microbiota may play a decisive role in infertility, highlighting the need for personalized therapeutic strategies based on microbial profiles.
ISSN:2076-2607