Reproduction (or making a baby) is a simple and natural experience for most couples.
However, for some couples it is very difficult to conceive.
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.
Male infertility is diagnosed when, after testing both partners, reproductive problems have been found in the male.