There can be many causes of male infertility, and it can be caused by a combination of various factors.

Some of the common causes of male fertility issues include:

• Low sperm count: This is a condition where there are not enough sperm in the semen, which can make it difficult to conceive.

• Poor sperm motility: This is a condition where the sperm are not able to swim properly, which can also make it difficult to conceive.

• Abnormal sperm shape: This can make it difficult for sperm to fertilize an egg.

• Varicocele: This is a condition where the veins in the testicles are enlarged, which can cause the temperature in the testicles to be too high, leading to poor sperm quality.

• Testicular injury or infection: This can cause damage to the testicles and affect sperm production.

• Hormonal imbalances: This can include problems with the thyroid, pituitary, or adrenal glands, which can affect sperm production.

• Medications: Some medications can affect sperm production and quality.

• Lifestyle factors: Poor diet, lack of exercise, smoking, alcohol consumption, and exposure to certain toxins can also contribute to male infertility.

• Genetic factors: Some genetic conditions can also cause male infertility.