Vaginal microbiome and its implications in preterm birth.

Area of Science:

• Reproductive Health
• Microbiology
• Public Health

Background:

• Preterm birth (PTB) affects 10% of pregnancies globally, causing significant neonatal morbidity and mortality.
• The multifactorial etiology of PTB involves inflammation, hormonal factors, genetics, and environmental influences like microbial dysbiosis.
• The vaginal microbiome's role in pregnancy outcomes, especially PTB, is an area of increasing research interest.

Purpose of the Study:

• To review and consolidate current findings on the vaginal microbiome's influence on PTB.
• To highlight microbial dysbiosis as a significant risk factor for PTB.
• To discuss research limitations and suggest future directions for microbiome studies in PTB.

Main Methods:

• This is a review article, consolidating existing research findings.
• Analysis of studies examining the association between vaginal microbiome composition and PTB.
• Comparison of findings across diverse populations, considering variations in ethnicity, sample collection, and methodologies.

Main Results:

• A decrease in Lactobacillus species in the vaginal microbiome is consistently associated with an increased risk of PTB across various populations.
• Despite methodological and demographic differences in studies, a Lactobacillus-dominant vaginal microbiome is generally linked to a reduced risk of PTB.
• Microbial dysbiosis is identified as a key risk factor contributing to PTB.

Conclusions:

• The vaginal microbiome composition, particularly the abundance of Lactobacillus, plays a crucial role in PTB risk.
• Further research is needed to fully understand the complex interactions between the microbiome, host factors, and environmental influences in PTB.
• Targeting vaginal microbiome dysbiosis may offer potential strategies for PTB prevention.