Japanese researchers at Hokkaido University have created mice with sperm that glows, a medical breakthrough aiding male reproductive health studies. This advancement allows for more accurate and humane testing of treatments, potentially benefiting human medicine.

Researchers in Japan have developed a method to make mouse sperm glow, offering a non-invasive way to study male reproductive health. This technique involves administering a bioluminescent substance, allowing scientists to monitor sperm production without dissection. The goal is to improve understanding of male fertility and reduce the number of animals needed for testing new medicines and treatments.