Male Fertility and Sperm Health: What Your Sex Drive and Testosterone Really Mean | Dr. Michael Eisenberg

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Feb 24, 2026

Dr. Michael Eisenberg, director of male reproductive health at Stanford and fertility researcher, breaks down what shapes sperm health. He covers how common meds and steroids affect fertility. He discusses sperm as a marker of long-term health, environmental toxins and microplastics, timing for conception, and lifestyle factors like sleep, exercise, and weight loss.

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ADVICE

Get A Semen Analysis And Hormone Panel Early

For a baseline fertility check, get a semen analysis (volume, concentration, motility, morphology, DNA fragmentation) and basic hormone panel to detect treatable causes.
Early evaluation can identify fixable problems like hypertension or varicocele before prolonged delays.

INSIGHT

Microplastics Are Present In Testes And Semen

Microplastics and environmental toxins are ubiquitous and have been found in testicles and semen, with some studies linking higher microplastic levels to lower semen quality.
Complete avoidance is currently impractical; small changes like avoiding plastic bottles may help reduce exposure.

ADVICE

Time Sex Every Other Day Around Ovulation

Time intercourse to the ovulation window and avoid excessive daily masturbation when trying to conceive; every-other-day around ovulation maximizes sperm payload.
Sperm can live ~2 days in the female tract, so plan sex on days 10–18 of a typical cycle and space ejaculations.

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Male fertility is declining, and most men have no idea why.

In this episode of The Dr. Gabrielle Lyon Show, Dr. Gabrielle Lyon sits down with Dr. Michael Eisenberg, Director of Male Reproductive Health at Stanford University and Chief Medical Advisor of SwimClub, to break down what truly determines sperm health and reproductive success.

They discuss:

How metformin, GLP-1 medications, testosterone therapy, and anabolic steroids affect male fertility
Why sperm count is a powerful biomarker for long-term health and longevity
The role of sleep, muscle mass, exercise, diet, marijuana, and environmental toxins like microplastics
Whether platelet-rich plasma, or PRP, can help severe male infertility
Daily habits that quietly reduce a couple’s chances of conceiving

If you care about fertility, hormones, metabolic health, or the future of men’s health, this conversation is essential.

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Find Dr. Michael Eisenberg at:

Eisenberg Lab: https://med.stanford.edu/eisenberglab.html
LinkedIn: https://www.linkedin.com/in/michael-eisenberg-9230a429
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Chapters:

00:00 Sex habits, libido, GLP-1s, and what counts as male infertility

01:46 Metformin and male fertility, what the Denmark study found

07:27 How long sperm take to regenerate after meds, illness, or chemo

09:24 GLP-1 medications, weight loss, and semen quality in men

10:52 Testosterone therapy, anabolic steroids, and why sperm shuts down

16:41 Sperm as a vital sign, fertility as a window into long term health

19:14 Microplastics and environmental toxins found in semen

22:21 Paternal age and sperm quality, DNA fragmentation and pregnancy risk

26:03 Supplements and nutrients for sperm quality, what matters and why

30:00 Sex frequency, masturbation, libido, and fertility myths

35:38 Male infertility guidelines and medications that quietly lower fertility

48:41 Semen quality and future disease risk, diabetes, cancer, mortality

54:45 Anabolic agents, sperm banking, and how long frozen sperm lasts

1:04:14 PRP for severe male infertility, azospermia and real outcomes

1:16:41 New frontiers in male fertility, immune profiles, genomics, omics

Disclaimers: This episode includes paid sponsorships.

The Dr. Gabrielle Lyon Podcast and YouTube are for general information purposes only and do not constitute the practice of medicine, nursing, or other professional health care services, including the giving of medical advice, and no doctor/patient relationship is formed. The use of information on this podcast, YouTube, or materials linked from this podcast or YouTube is at the user's own risk. The content of this podcast is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Users should not disregard or delay in obtaining medical advice for any medical condition they may have and should seek the assistance of their health care professional for any such conditions.