A man’s fertility generally relies on the quantity and quality of his sperm. If the number of sperm a man ejaculates is low or if the sperm are of a poor quality, it will be difficult, and sometimes impossible, for him to cause a pregnancy, then it's called a male infertility.
Taking medications to increase sperm.
Sperm Donor.
Taking hormones to improve hormone imbalance.
Avoiding taking long hot showers.
using hot tubs or saunas.
taking antibiotics to heal an infection.