Many couples experience fertility problems and low sperm count can be a key factor.

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Sperm counts in men worldwide have declined by half over the past 50 years and are continuing to fall, according to recent reports.

According to a medical expert, @firstdoctor, in a recent tweet, highlighted these 11 common ways men damage their sperm without knowing;

1. Tight underwears

2. Hot baths

3. Infections

4. Varicoceles

5. Laptops

6. Drugs

7. Mobile phones

8. Smoking

9. Marijuana

10. Heavy drinking

11. Steroids