What are the factors that cause male infertility?

Patient's question:

A student has been divorced for many years, but his wife has never been able to conceive a baby. Both husband and wife really love children, so they have always worked hard to have a child. Later, they went to the hospital for a thorough check-up and found that his husband suffered from male infertility. What kind of help is needed: Seeking help from doctors

Doctor's answer:

The main causes of male infertility include a low sperm count, high rates of sperm