Untangling Associations of Microbiomes of Pregnancy and Preterm Birth

Area of Science:

• Reproductive Health
• Microbiome Research
• Neonatal Morbidity and Mortality

Background:

• Preterm birth (PTB) is a leading cause of infant mortality and morbidity.
• Maternal microbiome composition is increasingly recognized as a factor in pregnancy outcomes.
• Understanding the interplay between different maternal microbial communities and PTB is crucial.

Purpose of the Study:

• To review the influence of maternal microbiomes (oral, gastrointestinal, placental, vaginal) on preterm birth.
• To dissect the specific roles of these microbiomes in PTB pathogenesis.
• To highlight key findings regarding the vaginal microbiome and its association with PTB.

Main Methods:

• Comprehensive literature review of studies investigating maternal microbiomes and preterm birth.
• Analysis of microbial dynamics across oral, gastrointestinal, placental, and vaginal environments.
• Focus on identifying microbial species and community structures associated with PTB risk.

Main Results:

• Specific maternal microbiomes, including oral, gut, placental, and vaginal, are implicated in PTB.
• The vaginal microbiome shows a significant association with PTB risk.
• Lactobacillus species in the vaginal microbiome appear protective, while certain anaerobes increase risk.

Conclusions:

• Maternal microbiome composition is a critical factor influencing preterm birth.
• The vaginal microbiome's role is highlighted, with specific bacterial groups affecting PTB risk.
• Social determinants of health also impact vaginal microbial communities and, consequently, PTB risk.