Unlocking clinical insights with semen

Fellow provides peer-reviewed, mail-in semen analysis for clinics looking for improved compliance and a patient-friendly solution to fertility testing.

For providers For patients

Trusted by leading urologists and reproductive specialists

Where clinical efficiency meets clinical excellence

Fellow's CLIA-certified diagnostics lab combines the ease of a mail-in semen analysis with peer-reviewed clinical performance to provide clinically valid results^§in less than 2 business days from when a specimen reaches our laboratory.

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Fellow supports:

1,500+

Clinics working with Fellow

93%

Patient satisfaction

97%

Up to 97% patient compliance^†‡

Our Tests

Pioneering a better patient experience to maximize compliance

We dramatically improve the testing experience for patients and clinic staff members, achieving compliance rates of up to 97%^‡ (compared to an established average of about 50% for in-office testing*) while providing results that are clinically validated to be as accurate as those from a fresh semen sample analyzed within 1 hour.

Vasectomy
Test

The most convenient way for patients to test the success of their vasectomy.

About this kit

Semen
Analysis

Easy,^† clinically validated semen analysis with results in less than 2 business days from when we receive a sample.

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An image of the Fellow Analysis + Cryopreservation

Semen Analysis + Cryopreservation

Following a full semen analysis, secure your fertility future with our reliable cryopreservation services.

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Success Stories

Helping hundreds of providers move patient care forward

1 of 9

As a high-volume vasectomy provider, Fellow post-vasectomy testing is the perfect solution for my patients as well as my practice. My patients are now able to complete their post-vasectomy semen analysis from the privacy of their own home, thereby increasing patient compliance. Once they complete testing, Fellow sends results to both me and my patient, decreasing the call volume into my practice previously required to communicate results.

David Robbins, MDUrologist at Urological Consultants of Florida, Miami, FL

As a vasectomy provider and fertility specialist, Fellow’s mail-in semen analysis allows my patients to provide a sample from the comfort of their home and get excellent laboratory-quality analysis and results. Fellow has simplified the process for my clinic to ensure patients get tested and I would highly recommend Fellow’s semen analysis for any patient or physician.

Sijo J. Parekattil, MDDirector of Avant Concierge Urology, Winter Garden, FL

We are very happy with Fellow and never want to go back! The whole clinic is happy to use Fellow, especially the providers. I even had a patient come in recently who was supposed to bring us in a sample and I offered him the option of a Fellow kit to do from home. He jumped on the option of buying the Fellow kit and was super excited to be able to do it all from home so that it was simpler for him.

Lindsey Wolf, RNClinical Nurse Lead at Urology Center of Iowa

As a high-volume vasectomy provider, Fellow post-vasectomy testing is the perfect solution for my patients as well as my practice. My patients are now able to complete their post-vasectomy semen analysis from the privacy of their own home, thereby increasing patient compliance. Once they complete testing, Fellow sends results to both me and my patient, decreasing the call volume into my practice previously required to communicate results.

David Robbins, MDUrologist at Urological Consultants of Florida, Miami, FL

As a vasectomy provider and fertility specialist, Fellow’s mail-in semen analysis allows my patients to provide a sample from the comfort of their home and get excellent laboratory-quality analysis and results. Fellow has simplified the process for my clinic to ensure patients get tested and I would highly recommend Fellow’s semen analysis for any patient or physician.

Sijo J. Parekattil, MDDirector of Avant Concierge Urology, Winter Garden, FL

We are very happy with Fellow and never want to go back! The whole clinic is happy to use Fellow, especially the providers. I even had a patient come in recently who was supposed to bring us in a sample and I offered him the option of a Fellow kit to do from home. He jumped on the option of buying the Fellow kit and was super excited to be able to do it all from home so that it was simpler for him.

Lindsey Wolf, RNClinical Nurse Lead at Urology Center of Iowa

Enabling breakthroughs in men's health, one sample at a time

Fellow is building a biobank of semen samples so that the most potent and accessible analyte—seminal fluid— can be used to yield breakthroughs across medical disciplines.

In partnership with leading experts and universities, we pioneer research in male reproductive sciences. Read our abstracts and articles here.

Our science

§ Samplaski et al. Development and validation of a novel mail-in semen analysis system and the correlation between one hour and delayed semen analysis testing; Fertil Steril. 2021;115(4):922-929

† Tolani et al. Mail-in semen analysis breaks down racial, educational, and income barriers to semen analysis completion. Proceedings from the Pacific Coast Reproductive Society (PCRS) Annual Meeting 2024. Indian Wells, CA.

‡ Gu et al. High compliance with Fellow semen analysis testing across the United States irrespective of clinical practice type. Proceedings from the American Urological Association Annual Meeting 2024. San Antonio, TX.

* Multiple publications report only 1 in 2 patients complete post-vasectomy semen analysis, including [1] Bradshaw et al., Urology, 2019, [2] Duplisea and Whelan, Journal of Urology, 2013 and [3] Johnson (Siegert) et al., Andrology & Gynecology: Current Research, 2019.