Semen Microbiome, Male Infertility, and Reproductive Health.

Summary: For decades, doctors believed that a healthy male reproductive system was completely sterile—free of bacteria. However, new science has overturned this old idea. Just like your gut, semen contains a complex "microbiome," a bustling ecosystem of microscopic organisms.

This review highlights how modern DNA sequencing technology has allowed scientists to map this hidden world. The findings are crucial: the balance of these bacteria plays a significant role in male fertility. While some bacteria act as guardians of reproductive health, an imbalance (dysbiosis) can lead to inflammation and infertility. Understanding this microbial community could be the key to new treatments for men struggling to conceive.