There are several factors that can cause infertility in men, including:

• Low sperm production: This can be caused by a variety of factors, including infections, hormonal imbalances, genetic defects, and health problems such as diabetes.

• Abnormal sperm function: Sperm may be immature, abnormally shaped, or unable to swim, which can make it difficult for them to fertilize an egg.

• Blockages: Blockages in the male reproductive system can prevent the delivery of sperm.

• Environmental factors: Overexposure to certain environmental elements such as heat, toxins, and chemicals can reduce sperm production or sperm function. For example, frequent use of saunas or hot tubs may temporarily impair sperm count. Sitting for long periods, wearing tight clothing, or working on a laptop computer for long stretches of time may also increase the temperature in the scrotum and slightly reduce sperm production.

• Lifestyle choices: Chronic health problems, injuries, and lifestyle choices such as smoking, excessive alcohol consumption, and drug use may contribute to male infertility.

• Age: Age-related factors can also play a role in male infertility. Men who are age 35 or older and have tried to conceive for six months or longer may be at higher risk.

• Medical treatments: Cancer treatments such as chemotherapy and radiation can affect sperm production.

Its important to note that in some cases, no cause of male infertility can be found.