Dr. Shanna Swan

guest·2 claims·1 episode·updated Jul 20, 2026

2 fact-checked claims across 1 episode on the Joe Rogan Experience. Each is a receipt: the exact quote, its timestamp, what published evidence says, and who benefits.

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Logged claims

  1. JRE #1638▶ 33:23

    “And at that point, the median, that's the middle of the distribution, was 99 million sperm per milliliter.”

    Swan states her 2017 meta-analysis found median sperm concentration in Western countries fell from 99 million/mL in 1973 to 47 million/mL in 2011.

  2. JRE #1638▶ 1:49

    “our sperm count, our miscarriage rates, our fertility rates, our testosterone levels, they're all going south, if you will, at the rate of about 1% per year”

    Swan claims sperm count, miscarriage rates, fertility rates, and testosterone levels are all declining at roughly 1% per year due to endocrine-disrupting chemicals.