4 Heat Habits That Can Damage Your Sperm DNA Directly

“Hot” Guys, Take Note!

Did you know? A man’s testicles need to stay 2–4°C cooler than the rest of the body for sperm to develop normally. When exposed to heat for too long — often from daily habits — sperm quality can drop, affecting fertilization and embryo development.

Here are 4 heat sources to watch out for:

1. Laptops and mobile phones

Keeping a laptop on your lap or a phone in your pocket for long hours exposes the testicles to direct heat.

2. Frequent hot baths or saunas

Regular exposure to hot temperatures above 37°C for more than 15 minutes can quickly raise testicular temperature and harm sperm.

3. Tight clothing

Wearing tight jeans, underwear, or non-breathable fabrics traps heat and reduces air circulation, causing heat build-up.

4. Long hours of driving or biking

Prolonged sitting positions and engine heat can raise scrotal temperature and lead to heat accumulation.

Healthy sperm can’t be seen from the outside. If you’re planning for fatherhood or concerned about sperm quality, SAFE Fertility Clinic offers comprehensive sperm health testing — including Sperm Analysis and DNA Sperm Fragmentation — performed by experienced specialists to assess your reproductive health with confidence.

Article by: Nattharut Kulphaweesuwan, M.D. (Dr.Kong)
SAFE Fertility Group PCL, Gaysorn Amarin Branch
Medical License Number 37453