Characteristics of the vaginal microbiome in women with premature ovarian insufficiency 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 31, 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.

  • Microbes
    Microbes

    Microbes, short for microorganisms, are tiny living organisms that are ubiquitous in the environment, including on and inside the human body. They play a crucial role in human health and disease, functioning within complex ecosystems in various parts of the body, such as the skin, mouth, gut, and respiratory tract. The human microbiome, which is […]

  • 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: 2025-07-31

Microbiome Signatures identifies and validates condition-specific microbiome shifts and interventions to accelerate clinical translation. Our multidisciplinary team supports clinicians, researchers, and innovators in turning microbiome science into actionable medicine.

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 study aimed to investigate the differences in the vaginal microbiome between women with premature ovarian insufficiency (POI) and healthy controls. POI is characterized by early ovarian failure, leading to amenorrhea and hormonal imbalance. The research sought to identify microbial community differences using 16S rRNA gene sequencing to explore how the vaginal microbiome might relate to hormonal levels and ovarian function. Specifically, it compared microbial compositions between 28 women with spontaneous POI and 12 healthy women, looking for patterns of microbial dysbiosis that might correlate with the disease.

Who was studied?

The study involved 40 women, aged 24 to 40 years, recruited from the Shenzhen Maternity and Child Healthcare Hospital. Of these, 28 women had spontaneous POI, diagnosed based on elevated serum levels of follicle-stimulating hormone (FSH) and luteinizing hormone (LH), alongside low estradiol and anti-Müllerian hormone (AMH) levels. The remaining 12 women, with normal ovarian function and hormone levels, were selected as controls. The study excluded women with autoimmune diseases, recent antibiotic use, or other conditions that could affect the vaginal microbiota or reproductive health.

Most important findings

The study identified significant differences in the vaginal microbiomes of women with POI compared to healthy controls. The microbial community in women with POI showed a higher diversity, as indicated by the weighted UniFrac distance, suggesting a more complex microbiome. Lactobacillus species, which are typically abundant in the vaginal microbiota of healthy women, were significantly reduced in the POI group. In contrast, the genera Streptococcus, Gardnerella, and Anaerococcus were found in higher quantities in women with POI. Correlation analysis further revealed that the abundance of Lactobacillus was positively correlated with estradiol levels, while the abundance of Streptococcus was associated with increased FSH and LH levels. These microbial shifts were linked to the hormonal imbalances typical of POI, suggesting that the vaginal microbiome may play a role in the pathophysiology of the disease.

Key implications

The findings highlight that alterations in the vaginal microbiota, particularly a decrease in Lactobacillus and an increase in potentially pathogenic genera like Streptococcus and Gardnerella, are associated with POI. These changes may influence the inflammatory and immune responses in the vaginal environment, which could contribute to ovarian dysfunction. Understanding the link between microbiome composition and ovarian health in POI could lead to novel microbiome-targeted interventions, such as probiotic interventions, to restore balance and potentially mitigate the symptoms of POI. Future research should aim to explore the causality of these microbiome shifts and their direct impact on ovarian function.

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.

Microbiome-Targeted Interventions (MBTIs)

Microbiome Targeted Interventions (MBTIs) are cutting-edge treatments that utilize information from Microbiome Signatures to modulate the microbiome, revolutionizing medicine with unparalleled precision and impact.

Join the Roundtable

Contribute to published consensus reports, connect with top clinicians and researchers, and receive exclusive invitations to roundtable conferences.