The initiative aims to raise awareness of the decline in male fertility. The winner will receive a prize of 100 thousand dollars.
San Francisco is about to be the stage for first “World Sperm Race” in the world, in an event that mixes science, sport and spectacle.
The competition, created by a group of technology entrepreneurs, will have 128 semen samples representing countries from all over the world, competing on a microscopic race track. The initiative aims not only to entertain, but also to draw attention to the decline in male fertility rates around the world.
Participants will submit samples in specialized kits, which will be processed in the laboratory to isolate viable sperm. These cells will “run” along a microfluidic track of just 400 micrometers — about the size of a grain of salt — under a microscope. The winner will be determined by which sperm in the sample reaches the finish line first, and the winning contestant will receive a prize of US$ 100 thousand.
According to the organizers, more than 10,000 candidates of countries from various continents expressed interest. Finalists will be selected based on eligibility criteria including age, health status and nationality or ancestry with the country they represent, explains the .
The event will follow a tournament format, with initial timed tests followed by knockout rounds, similar to major international sporting competitions. The races will be recorded with high-resolution images and broadcast online, with real-time data about participants’ performance and health metrics displayed to viewers.
Although the concept has attracted attention due to its unconventional nature, its creators claim that the objective is stimulate discussion about male reproductive health. Global studies have indicated a significant decline in sperm concentration in recent decades, with some estimates suggesting a drop of more than 50% between 1973 and 2018.
Health experts have linked this trend to factors such as lifestyle habits, environmental exposure and broader public health problems. Despite this, male fertility remains an often neglected or stigmatized topic.
The event is based on a smaller pilot competition held in Los Angeles in 2025, where two participants competed in front of a live audience. Organizers say the next international edition aims to expand awareness and engagement on a much larger scale.
