Smoking and alcohol consumption
Smoking and alcohol consumption decreases sperm motility, which is their ability to move effectively. Reduced motility results in fewer sperm reaching the egg, thus lowering the chances of a successful pregnancy. Moreover, smoking can harm the DNA within sperm, leading to a higher risk of both difficulty conceiving and early miscarriage.

Obesity
Obesity can lead to an imbalance in hormone levels, specifically the ratio of estrogen to testosterone. This hormonal shift can harm sperm production and quality, as testosterone levels decrease.

Increased heat from laptops and tight pants
Exposing your testicles to excessive heat, whether through prolonged laptop use or wearing tight pants or undergarments can harm sperm health. Elevated temperatures around the testicles negatively impact sperm quality and quantity. It is essential to allow your testicles to stay at a comfortable temperature to support healthy sperm production.

Diet
The type of food you consume can also impact your sperm health. A diet high in trans fats, often found in packaged and ready-to-eat foods, can reduce the quality of your sperm. Carbonated and fizzy drinks have high sugar contents which is not advisable. 

Lack of sleep
Shift work or irregular sleep patterns can disrupt the body's circadian rhythm, affecting the quality and quantity of sperm. Getting at least seven to eight hours of restorative sleep each night is essential to improve sperm motility and quality.

With inputs from IANS