Alcohol Cut down
Drinking too much alcohol can damage the quality of your sperm. You shouldn’t drink more than three to four units of alcohol a day if you and your partner are trying for a baby.
There is no consistent evidence that caffeinated beverages can cause fertility problems. But the combination of coffee, drinking and smoking can affect the quality of your sperm.
The testicles are responsible for producing and storing sperm. Tight underwear can cause a higher scrotal temperature which can reduce sperm quality.
Keep your testicles cool
A man's testicles should be one or two degrees cooler than the rest of his body. Tight underwear, hot showers and hot baths, driving for long distances, and laptops can raise the temperature of the testicles and affect sperm quality.