More than semen analysis
Fellow is a high-complexity mail-in semen analysis lab and the largest dedicated semen analysis facility in the U.S., with more than 225,000 samples analyzed to date. Our clinically validated mail-in process¹ accounts for semen degradation over time—making it the only mail-in test proven to match the accuracy of a traditional 1-hour analysis.
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Newsflash: Patients don’t want to produce a semen sample in public.
Fellow was founded in 2018 with the simple goal of making semen analysis accessible, comfortable, and easy to understand. Once our clinical validation was published in Fertility & Sterility in 2021¹, we were able to offer the only diagnostic-grade mail-in semen analysis on the market. We have now help thousands of U.S. urology and fertility clinics improve lab economics, reduce risk, expand access to testing, and drive patient conversions to treatment—with new customers added all the time.
Fellow is pioneering the semen-based diagnostics of the future.
Powered by expert scientific leadership, and in partnership with clinics and academic institutions nationwide, our vision for the future of semen-based diagnostics is already taking shape. In groundbreaking research, we have demonstrated that seminal plasma is rich in cell free DNA (cfDNA) from somatic cells, and provided new insights into its potential as a liquid biopsy for several conditions. Furthermore, we’ve shown that biomarkers in seminal fluid can differentiate clinically significant prostate cancer (Grade Group 2+) from indolent cancer or no cancer.
Meet our team
Industry leaders drive our commercial, clinical, and research expertise. With leadership firmly in place, our commercial and R&D programs are well-established and poised for transformation.
Fellow is partnering with Sunfish, the leading family-building platform focused on the financial side of fertility, to remove barriers to male fertility testing.
Following New York conditional approval, Fellow Health extends its mail-in semen analysis to practices statewide, deepening partnerships and expanding referral networks
Fellow's platform provided data for five studies that will be presented at the AUA 2026 Annual Meeting. The studies draw on a network of >3,000 clinical practices.
The Y Factor, a Houston-based men’s health platform focused on fertility, sexual performance & hormone optimization, announced a strategic partnership with Fellow.
Fellow Health today announced that industry executive and private equity advisor Paul Kappelman has been appointed Independent Chairman of the Board.
