The Male Fertility Crisis No One Is Talking About

Dr Karan Rajan chats with Professor Sheryl Homa about male infertility, sperm DNA damage, lifestyle, heat exposure, environmental toxins, microbiome health, and why men’s fertility is often overlooked. Professor Homa explains why infertility should be treated as a health issue for both partners, what semen analysis can and cannot tell you, and why sperm health may reflect wider problems such as diabetes, inflammation, kidney disease, hemochromatosis, stress and metabolic health.

Dr. Karan Rajan is a doctor, author, and educator dedicated to making health and medical science accessible to all. Through evidence-based analysis, he addresses topics such as gut health, brain health, and healthy lifestyle choices, while dispelling common medical myths with a touch of dark humor. His content provides reliable, research-driven insights designed to inform and empower viewers to better understand their health.

In this conversation, we cover:

• Why global sperm counts appear to be falling
• Why male infertility is often under-investigated
• Sperm DNA fragmentation and miscarriage risk
• Heat exposure, varicoceles and testicular temperature
• Obesity, testosterone, inflammation and sperm quality
• Microplastics, BPA, phthalates and endocrine disruption
• Vaping, alcohol, smoking and sperm health
• What men should do before trying to conceive

Video Sections / Timestamps:

• 00:00 Sperm Counts Are Falling Globally
• 01:02 Why Male Fertility Has Been Ignored
• 05:27 Semen Analysis & Sperm DNA Damage
• 07:20 Why DNA Fragmentation Testing Is Controversial
• 12:50 Microplastics, BPA & Endocrine Disruptors
• 15:11 Do Men Have A Biological Clock?
• 19:15 Obesity, Life Style, Inflammation & Sperm Quality
• 26:54 Varicoceles: A Treatable Cause Of Male Infertility
• 29:01 What Fertility Tests Should Men Consider?
• 30:32 Are At-Home Sperm Tests Accurate?
• 34:01 Vaping, Medications & Sperm Health
• 36:23 Do Fertility Supplements Actually Help?
• 40:32 Stress, Hormones & Fertility
• 43:36 What Men Should Do Before Trying To Conceive
• 48:29 Sperm Health, Gut Health & Final Takeaways