Swimmers is the only U.S. male fertility telemedicine practice that offers both diagnostic labs and prescription medication.
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You make 50–100 million new sperm daily, but it takes about 3 months for those cells to become fully functional. Plan and measure in 90-day cycles.



Fertility potential is shaped by conditions during production—diet, sleep, heat, nicotine, alcohol, meds, and stress. We separate signal from noise with targeted serum labs that guide action.





Male factor contributes to about half of infertility cases. Improving sperm quality raises the odds of natural conception and increases the efficiency of IUI and IVF.
Your initial assessment leads to an actionable plan: complete labs, have them reviewed, and adjust treatment as needed. Everything lives in one place - labs, provider messaging, refills, and delivery - with an all-inclusive membership. Care is led by our chief medical officer, Dr. Doron Stember, a board-certified urologist and male fertility specialist.


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Learn about the doctor who is changing the male fertility landscape.

Dr. Stember is a board-certified urologist who specializes in male fertility and sexual health. He received his medical degree from New York University School of Medicine and completed a general surgery internship and urology residency at Mount Sinai Hospital.
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The Swimmers Approach
Asynchronous care, clinician reviewed
Answer guided questions at your pace. A licensed provider reviews your case, messages you with clear next steps, and follows you over time. Our goal is the same as yours - pregnancy and a healthy newborn!
Male fertility labs, anywhere
We’ll order labs that you can complete at a nearby LabCorp or Quest location. If you prefer, we can have an at-home Tasso lab kit sent to your home for collection. If you prefer, expert phlebotomists can be scheduled to come to your home or office (not available in all zip codes). We test the essential male fertility panel: Testosterone (T), SHBG, FSH, LH, prolactin (PRL), and estradiol (E2). When indicated, we add chromosomal analysis and Y-chromosome microdeletion testing.
Treatment that protects fertility
If appropriate, we prescribe enclomiphene to support endogenous testosterone while preserving fertility potential as well as daily low-dose tadalafil for erection consistency and ejaculate volume. Dosing is precise and customized and supports practical lifestyle guidance that we’ll also provide.