Can Pathogens in the Prostate and Vagina Cause Infertility? Exploring Dr. Toth’s Theory

Infertility affects millions of couples worldwide, and while many are quick to point to hormonal imbalances or structural issues, Dr. Attila Toth, a reproductive immunologist and fertility expert, proposed a less conventional yet thought-provoking theory:

“Difficulty in fertilizing an egg may be due to hidden infections in the male prostate and the female vagina.”

But how credible is this idea? And what does modern science say about pathogens' role in reproductive challenges?

This article takes a deeper look at Dr. Toth's infection-based theory of infertility, and evaluates it through the lens of peer-reviewed scientific studies.

Who Is Dr. Attila Toth?

Dr. Toth, a now-retired physician affiliated with New York Hospital-Cornell University Medical College, authored the book “Fertile vs. Infertile: How Infections Affect Fertility and IVF”, where he outlines how subclinical (often undiagnosed) infections in the male and female reproductive tracts may silently sabotage fertility efforts—especially in cases labeled as "unexplained infertility."

Dr. Toth believed that:

• Bacterial, fungal, and viral pathogens may colonize the prostate gland in men and the vagina or cervix in women.
• These infections can impair sperm function, egg viability, or embryo implantation.
• Many of these infections are asymptomatic, which is why standard fertility assessments often miss them.
• Treating these infections with targeted antibiotics or antifungals can, in some cases, restore fertility.

What Does the Research Say?

Several scholarly articles support the notion that infections in the reproductive tract can affect fertility in both men and women. While not all explicitly name Dr. Toth, they align with his proposed mechanism.

1. Infections in the Male Reproductive Tract

• Ochsendorf, F. R. (2008). “Infections in the male genital tract and reactive oxygen species.”
  Human Reproduction Update, 14(4), 385–399.
  ➤ This study explains how bacterial infections in the prostate and seminal vesicles generate reactive oxygen species (ROS), which damage sperm DNA and reduce motility—key barriers to fertilization.
  https://doi.org/10.1093/humupd/dmn010

• Punab, M., et al. (2003). “The role of prostate infection in male infertility.”
  International Journal of Andrology, 26(1), 48–53.
  ➤ The study found chronic prostatitis significantly correlated with abnormal semen parameters, especially sperm motility and morphology.
  https://doi.org/10.1046/j.1365-2605.2003.00395.x

2. Female Genital Tract Infections and Fertility

• Witkin, S. S. et al. (2007). “Immune recognition of infection and inflammation in the female genital tract and the potential for infertility.”
  American Journal of Reproductive Immunology, 57(2), 104–112.
  ➤ This paper discusses how even mild or subclinical infections can lead to immune activation that harms the endometrium and prevents embryo implantation.
  https://doi.org/10.1111/j.1600-0897.2006.00455.x

• Van Oostrum, N., et al. (2013). “The role of infection in subfertility.”
  Human Reproduction Update, 19(1), 78–92.
  ➤ Concluded that bacterial vaginosis and sexually transmitted infections (STIs) like Chlamydia trachomatis and Mycoplasma hominis are linked with tubal damage and lower IVF success rates.
  https://doi.org/10.1093/humupd/dms041

3. Biofilms and Chronic Infections

• Swidsinski, A., et al. (2005). 
  ➤ Found that biofilms—dense colonies of bacteria resistant to antibiotics—could form in the vagina, suggesting chronic infection is harder to detect and treat.
  https://doi.org/10.1097/01.AOG.0000182467.53106.db

Clinical Implications

Dr. Toth’s approach, though controversial, urges clinicians to:

• Take a microbial health inventory of both partners in infertile couples.
• Consider targeted cultures, PCR testing, and microbial sensitivity before declaring a case “unexplained infertility.”
• Treat chronic or subclinical infections pre-IVF or IUI.

Caveats and Criticism

• Not all experts agree on the clinical significance of these hidden infections.
• Some believe overtreatment with antibiotics may cause more harm than good—disrupting healthy microbiota or leading to resistance.
• The relationship between infection and infertility may be correlational, not causational, in some cases.

Final Thoughts

While Dr. Toth’s ideas initially met skepticism, growing scientific evidence suggests he may have been ahead of his time. The role of low-grade, asymptomatic infections—especially in the prostate and vaginal microbiome—deserves closer attention from fertility specialists.

For couples struggling with “unexplained infertility,” exploring microbial causes may provide new answers—and new hope.

References

Ochsendorf FR. (2008). Infections in the male genital tract and ROS

Punab M, et al. (2003). Prostate infection and male infertility

Witkin SS, et al. (2007). Immunity and infertility in the female tract

Van Oostrum N, et al. (2013). Infection and subfertility

Swidsinski A, et al. (2005). “Adherent biofilms in bacterial vaginosis.” Obstetrics & Gynecology, 106(5), 1013–1023.