The study, published in the Journal of Dental Research, tracked immune markers from the mouth to the ovaries, showing elevated inflammatory markers and DNA damage in eggs, according to a summary of the research. [1]
Lead researcher Dr. Yael Keren stated, "We observed changes in ovarian tissue that resemble patterns seen with reproductive aging, suggesting oral inflammation may accelerate ovarian decline." The findings are limited to animal models and have not been confirmed in humans, researchers said.
Background: The oral-systemic connection
Previous research has linked periodontal disease to cardiovascular disease, diabetes, and adverse pregnancy outcomes, according to the American Academy of Periodontology. Chronic gum inflammation releases inflammatory molecules into circulation, affecting distant organs.
Oral pathogens and their toxins can pass from the gums into the bloodstream, causing secondary infections and chronic inflammation throughout the body. [2] The current study adds reproductive health to that list, though researchers emphasized the need for human trials.
A 2023 meta-analysis in the Journal of Clinical Periodontology reported that women with untreated gum disease had higher rates of preterm birth and preeclampsia.
Fertility itself requires multiple steps, including egg production, sperm health, and a suitable uterine environment, any of which can be disrupted by systemic inflammation, which outlines the basic requirements for conception. [3]
Study Methodology and Findings
Researchers induced chronic oral inflammation in mice by placing ligatures around the molars, mimicking dental implant–associated peri-implantitis, according to the study summary. [1] They measured immune activity in lymph nodes, spleen, and ovaries; ovarian tissue showed elevated pro-inflammatory cytokines and oxidative damage.
Eggs from affected mice exhibited DNA damage and epigenetic modifications consistent with accelerated reproductive aging, the report stated. Disrupted follicle development and lower birth rates were observed compared to control mice.
Keren said, "The inflammatory signal traveled from the mouth to the ovaries through the bloodstream and lymphatics, altering the ovarian microenvironment."
These biological changes appeared to have meaningful consequences. Mice exposed to chronic oral inflammation produced lower-quality eggs and had lower live birth rates compared to controls, according to the paper.
Implications for Human Fertility
Because the study used mice, direct application to humans remains uncertain, researchers said. However, the findings align with growing evidence that chronic inflammation impairs reproductive function, according to Dr. Megan O’Brien, a reproductive endocrinologist not involved in the study.
O’Brien said, "Reducing systemic inflammation through oral hygiene, diet, and lifestyle could support ovarian health, though more human data are needed."
Age remains the strongest predictor of fertility decline, but modifiable factors such as oral health may play a supporting role. [3] Excessive stress, poor diet, sleep deficiency, and thyroid problems can disturb normal endocrine function, all of which also influence inflammation.
The study authors recommended viewing dental care as part of overall health maintenance rather than a fertility guarantee, according to the report. [5]
Antibacterial compounds such as triclosan, found in some oral care products, have raised concerns regarding hormone regulation and fertility in animal studies. [4]
Conclusion
The Hebrew University study provides one of the clearest biological links between oral inflammation and ovarian function, according to the paper. Researchers called for further investigation in human populations to confirm the pathway and assess clinical relevance.
In the meantime, maintaining routine dental visits and addressing gum inflammation remain low-cost, low-risk health measures, officials said. [5]
Keren stated, "Our findings suggest that oral health should be considered an important component of preconception care, but more research is required before making direct recommendations."
References
- The Mouth-Fertility Connection: How Chronic Oral Inflammation Silently Affects Your Reproductive Health. BrightLearn.ai. May 31, 2026.
- Mercola.com. "Pathogens in Your Mouth Can Lead to Cancer". March 5, 2014.
- Gary Null. "The complete encyclopedia of natural healing".
- Mercola.com. "Best Selling Toothpaste Contains Hazardous Ingredients". August 27, 2014.
- Mindbodygreen.com. "The Surprising Connection Between Your Gums & Your Ovaries". June 10, 2026.
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