Close Banner Women's Health The Vaginal Microbiome Impacts Fertility, Immunity & More: 10 Ways To Nurture It Author: Christine Tara Peterson, PhD, AHP, RYT March 01, 2026 Ayurveda & Yoga Researcher By Christine Tara Peterson, PhD, AHP, RYT Ayurveda & Yoga Researcher Dr. Christine Tara Peterson PhD, AHP, RYT is a highly accomplished practitioner and researcher in Ayurveda and Yoga. She has a background in Microbiology & Immunology, which she has integrated with her knowledge of Ayurveda and Herbal Medicine to become a renowned expert in the field. Image by Daniel Kim Photography / Stocksy March 01, 2026 We carefully vet all products and services featured on mindbodygreen using our commerce guidelines. Our selections are never influenced by the commissions earned from our links. The human body functions as a sophisticated ecosystem, hosting trillions of microorganisms collectively known as the microbiome. Amid the diverse microbiomes within the human body, the vaginal microbiome stands out. Over the last two decades, scientists have made significant strides in unraveling the intricacies of the vaginal microbiome, illuminating its profound impact on women's health. Let's delve into the significance of the vaginal microbiome, how to know if yours is healthy, and daily practices to get it in better shape. What makes the vaginal microbiome so important? The vaginal microbiome is a dynamic community of microorganisms (primarily bacteria) residing in the vaginal tract. The equilibrium and diversity of these microorganisms can influence women's reproductive health, immune function 1 , and more. Here are some key reasons why a healthy vaginal microbiome is so important: Infection prevention:  A balanced vaginal microbiome acts as a natural defense mechanism, preventing the overgrowth of harmful bacteria and reducing the risk of infections, including  bacterial vaginosis and yeast infections 2 . Reproductive health:  An optimal microbiome contributes to a healthy reproductive environment. The microbiome's balance is closely linked to  fertility, successful pregnancies, and prevention of complications 3  such as preterm birth. Immune function:  The vagina is a mucosal site, which means it is an immune site. One type of bacteria,   Lactobacilli,  for example, can  modulate the activity of immune cells 4 , such as macrophages and dendritic cells, helping to maintain an appropriate and balanced immune response. A well-balanced microbiome helps fend off pathogens, contributing to overall immune resilience. Hormonal regulation:  Hormonal changes  throughout a woman's life, from puberty to menopause, influence the composition of the vaginal microbiome. For instance, during menstruation, the vaginal pH may transiently rise, creating conditions that favor the growth of specific bacteria. Understanding and maintaining this balance is essential for overall hormonal health. Understanding the vaginal microbiome Unlike the gut microbiome, characterized by high diversity of microbial species, the vagina houses a specialized community with lower diversity. The lower microbial diversity and specialization make the vaginal community delicate. It undergoes dynamic changes throughout the monthly cycle and shifts in response to sexual activity and other lifestyle factors. As such, the vaginal microbiome exhibits fascinating variability 5 . Initiatives, like the Isala project , showcase the evolving landscape of vaginal microbiome research. In this citizen science project, named after Belgium's first female doctor, Isala Van Diest, women collect their vaginal samples to contribute to a more comprehensive understanding of vaginal microbiota. So far, we know that the Lactobacillus species of bacteria, renowned for producing lactic acid, seem to play an important role in this delicate and diverse ecosystem. By creating an acidic environment, they inhibit the growth of harmful pathogens. In the Isala project, Lactobacillus crispatus has emerged as the most prevalent taxon in the healthy cohort, followed by Lactobacillus iners and Gardnerella species. While Lactobacillus species often dominate a healthy vaginal microbiome, women's exact microbial makeup seems to depend on  6 factors such as age, motherhood, hormonal levels, and menstrual stage. In addition, menstrual products, contraceptives, sexual activity, partnership choices, and diet also seem to modulate the vaginal microbiome in fascinating ways. How to tell if yours is balanced An imbalance in the vaginal microbiome, known as a dysbiosis, is linked to various health issues such as bacterial vaginosis 7 (BV), characterized by dysbiosis from an overgrowth of pathogenic bacteria. Determining whether your vaginal microbiome is in good balance involves paying attention to certain signs and symptoms. While individual variations are normal, here are some indicators of a healthy vaginal microbiome: You have normal disc