Changes in the vaginal microbiota associated with primary ovarian failure Original paper

Researched by:

  • Divine Aleru ID
    Divine Aleru

    User avatarI am a biochemist with a deep curiosity for the human microbiome and how it shapes human health, and I enjoy making microbiome science more accessible through research and writing. With 2 years experience in microbiome research, I have curated microbiome studies, analyzed microbial signatures, and now focus on interventions as a Microbiome Signatures and Interventions Research Coordinator.

    Read More

July 30, 2025

  • Women’s Health
    Women’s Health

    Women’s health, a vital aspect of medical science, encompasses various conditions unique to women’s physiological makeup. Historically, women were often excluded from clinical research, leading to a gap in understanding the intricacies of women’s health needs. However, recent advancements have highlighted the significant role that the microbiome plays in these conditions, offering new insights and potential therapies. MicrobiomeSignatures.com is at the forefront of exploring the microbiome signature of each of these conditions to unravel the etiology of these diseases and develop targeted microbiome therapies.

  • Primary Ovarian Insufficiency (POI)
    Primary Ovarian Insufficiency (POI)

    Primary Ovarian Insufficiency (POI) is a medical condition in which a woman’s ovaries stop functioning normally before the age of 40. This leads to reduced estrogen production and irregular menstrual cycles, which may eventually result in infertility and early menopause-like symptoms. POI can occur due to various reasons, including genetic factors, autoimmune disorders, chemotherapy, or unknown causes. Though often misunderstood and misdiagnosed, POI can significantly impact a woman's physical and emotional well-being. Early diagnosis and appropriate treatment, including hormone replacement therapy (HRT) and fertility interventions, can help manage symptoms, improve quality of life, and in some cases, restore fertility.

Researched by:

  • Divine Aleru ID
    Divine Aleru

    User avatarI am a biochemist with a deep curiosity for the human microbiome and how it shapes human health, and I enjoy making microbiome science more accessible through research and writing. With 2 years experience in microbiome research, I have curated microbiome studies, analyzed microbial signatures, and now focus on interventions as a Microbiome Signatures and Interventions Research Coordinator.

    Read More

Last Updated: 2025-07-30

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Divine Aleru

I am a biochemist with a deep curiosity for the human microbiome and how it shapes human health, and I enjoy making microbiome science more accessible through research and writing. With 2 years experience in microbiome research, I have curated microbiome studies, analyzed microbial signatures, and now focus on interventions as a Microbiome Signatures and Interventions Research Coordinator.

What was studied?

This research aimed to investigate the differences in the vaginal microbiota of women with Primary Ovarian Failure (POF) compared to healthy controls. Primary ovarian failure, characterized by the loss of ovarian function in women under 40, is a complex condition influenced by autoimmune dysfunction, genetic factors, and environmental exposures. The study used high-throughput 16S rRNA gene sequencing to profile the vaginal microbiota of 22 patients with POF and 29 healthy women. The research sought to explore the potential relationship between vaginal flora alterations and clinical characteristics of POF, focusing on how specific microbial communities might influence reproductive health outcomes.

Who was studied?

The study population consisted of 22 women diagnosed with Primary Ovarian Failure (POF) and 29 healthy women as controls. The patients with POF were aged between 20 and 40 years and had experienced the cessation of menstruation for at least four months, with high levels of follicle-stimulating hormone (FSH) and low estradiol (E2) levels. Healthy control women were chosen based on having regular menstrual cycles and normal reproductive hormone levels, with exclusion criteria including recent antibiotic use, liver or kidney dysfunction, and other conditions that could affect reproductive health. The research aimed to identify microbial differences between women with POF and those with normal ovarian function.

Most important findings

The study revealed significant differences in the vaginal microbiota between patients with POF and healthy controls. Patients with POF exhibited a more diverse and richer vaginal microbiota compared to healthy women. The most notable microbial differences were seen in the relative abundance of Lactobacillus species. In the control group, Lactobacillus gallinarum was the dominant species, whereas in the POF group, L. iners became more prevalent while L. gallinarum decreased. Furthermore, the presence of Gardnerella and Prevotella species was more abundant in the POF group, correlating with higher serum FSH and LH levels and lower E2 levels, indicating a possible connection between these microbial shifts and reproductive health indicators. Notably, L. gallinarum was positively associated with estradiol (E2) levels, while L. iners was negatively correlated with these hormone levels. The study also identified a set of 34 genera whose relative abundances could help predict the occurrence of POF with high accuracy.

Key implications

The findings suggest that the vaginal microbiota, particularly the balance of Lactobacillus species, plays a critical role in the pathogenesis of Primary Ovarian Failure. The alteration of specific microbial populations, including an increase in L. iners and a decrease in L. gallinarum, may be linked to hormonal imbalances associated with POF. These results indicate that modifying the vaginal microbiota, potentially through the use of probiotics, could offer a new avenue for managing or delaying the onset of POF. Future research exploring the therapeutic potential of vaginal probiotics to restore microbial balance could improve reproductive outcomes in women with POF and help mitigate associated symptoms.

Primary Ovarian Insufficiency (POI)

Primary Ovarian Insufficiency (POI) is a medical condition in which a woman’s ovaries stop functioning normally before the age of 40. This leads to reduced estrogen production and irregular menstrual cycles, which may eventually result in infertility and early menopause-like symptoms. POI can occur due to various reasons, including genetic factors, autoimmune disorders, chemotherapy, or unknown causes. Though often misunderstood and misdiagnosed, POI can significantly impact a woman's physical and emotional well-being. Early diagnosis and appropriate treatment, including hormone replacement therapy (HRT) and fertility interventions, can help manage symptoms, improve quality of life, and in some cases, restore fertility.

Probiotics

Probiotics are live microorganisms that offer significant health benefits when administered in adequate amounts. They primarily work by modulating the gut microbiome, supporting a balanced microbial ecosystem. Probiotics have been shown to improve gut health, modulate immune responses, and even influence metabolic and mental health disorders. With growing evidence supporting their therapeutic potential, probiotics are increasingly recognized for their role in treating conditions like irritable bowel syndrome (IBS), antibiotic-associated diarrhea (AAD), and even mental health conditions like depression and anxiety through their impact on the gut-brain axis.

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