The NUMBNUTS Journal / Know your nuts

Heat. Plastic. Your nuts.
Straight answers.

Heat. Underwear. Male fertility. Understand the research, question the claims, and make more informed choices.

THE EVIDENCE EDITEducational information. Primary sources. No miracle promises.
Is Your Laptop Cooking Your Sperm Count?GUIDE 01Is Your Laptop Cooking Your Sperm Count?A laptop on your lap is one of the most common modern heat sources, and one of the easiest to fix. Here is what it does to scrotal t...Read the guide →Trying to Conceive: The Male-Factor ChecklistGUIDE 02Trying to Conceive: The Male-Factor ChecklistMale factors are involved in about half of couples trying to conceive, and much of it is controllable. A calm, practical checklist, ...Read the guide →Should You Ice Your Testicles? What's Real and What's HypeGUIDE 03Should You Ice Your Testicles? What's Real and What's HypeIcing your testicles is having a moment. The honest version: what cooling is actually supported to do for sperm, the testosterone cl...Read the guide →Does Sauna Affect Sperm Count? What the Research Actually SaysGUIDE 04Does Sauna Affect Sperm Count? What the Research Actually SaysYes, sauna heat is linked to a temporary dip in sperm count and motility. Here is what the research shows, how long recovery takes, ...Read the guide →
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