Nat's Notes #7 The Fertility Crisis (Count Down by Dr. Shanna Swan)
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Sep 1, 2023 
Dr. Shanna Swan, an expert in reproductive development and author, discusses the alarming decline in fertility rates. Topics include disastrous changes in sperm count, consequences of low testosterone, the rise in miscarriages, effects of alcohol and drugs, endocrine disrupting chemicals and gender dysphoria, effects of pesticides and herbicides, and strategies to protect fertility.
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Dramatic Fertility Decline
- Sperm concentration and total count in Western men dropped over 50% since the 1970s.
- Fertility is declining significantly even with healthier lifestyle trends.
Testosterone Paradox in Fertility
- Testosterone levels in men have declined about 1% per year since 1982, causing physical and mental health issues.
- Testosterone replacement therapy improves levels but drastically lowers sperm count, hurting fertility.
Men's Fertility and Age Effects
- Male fertility and sperm quality decline with age, increasing risks of genetic disorders and miscarriage.
- Men’s biological clocks matter; father’s age influences partner’s miscarriage risk and child health.