What are the characteristics of male infertility?

Patient's question:

The hospital examination said I am infertile.

Doctor's answer:

Hello
With the increasing pollution and work pressure, the ability of men to produce sperm has been severely affected. The average sperm count of modern men has significantly decreased, and the number of men with infertility has been rising year by year. According to statistics, out of ten infertile couples, three to four pairs are due to male infertility. Male infertility can be almost clearly diagnosed by physical examinations, medical history inquiries, semen analysis, blood tests for hormones and chromosomal tests, and at most, adding testicular biopsy and Y chromosome gene defect tests.
Guidance:
There are many causes of male infertility, such as congenital developmental abnormalities, genetic diseases, endocrine disorders, sperm autoimmune reactions, high-temperature environments, radiation diseases, chronic poisoning from chemicals and heavy metals, long-term medication use, smoking and excessive alcohol consumption, malnutrition, reproductive system infections, obstruction of the spermatic duct or reproductive system tumors, varicocele, sexual dysfunction, long-term separation, and lack of sexual knowledge. All of these can lead to male infertility.