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Updated: Apr 15, 2026

Author Spotlight: Revolutionizing Research on Vaginal Microbiome Interactions Using a Vaginal Chip
Published on: February 16, 2024
Complementary seminovaginal microbiome in couples.
Reet Mändar1, Margus Punab2, Natalja Borovkova1
1Department of Microbiology, Faculty of Medicine, University of Tartu, Tartu, Estonia; Competence Centre on Health Technologies, Tartu, Estonia.
This study reveals a connection between male seminal and female vaginal microbiomes. Semen microbiome diversity is higher than vaginal, and intercourse impacts the vaginal microbiome composition.
Area of Science:
- Reproductive Biology
- Microbiology
- Human Health
Background:
- The genital tract microbiome significantly impacts reproductive health.
- Research on the vaginal microbiome is extensive, but male microbiome data remains limited.
- Studies investigating coupled microbiomes are exceptionally rare.
Purpose of the Study:
- To compare seminal and vaginal microbiomes within couples.
- To evaluate the effect of sexual intercourse on the vaginal microbiome.
- To explore the association between male and female genital tract microbiomes.
Main Methods:
- Included 23 couples, analyzing semen and vaginal fluid (pre- and post-intercourse).
- Utilized Illumina HiSeq2000 sequencing of the 16S rRNA gene's V6 region for microbiome profiling.
- Assessed bacterial diversity, concentration, and specific species abundance.
Main Results:
- Seminal microbiomes exhibited higher diversity but lower bacterial concentrations compared to vaginal microbiomes.
- Gardnerella vaginalis predominance in women correlated with male leukocytospermia (inflammation).
- A decrease in Lactobacillus crispatus was observed post-intercourse, with high semen-vaginal sample concordance.
Conclusions:
- Seminal and vaginal microbiomes are interconnected.
- Male genital tract inflammation may influence the female partner's vaginal microbiome composition.
- Sexual intercourse alters the vaginal microbiome, suggesting microbial exchange within couples.
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