For successful conception, a mature and normal sperm and egg must be combined. If a man has oligospermia, the chances of pregnancy are reduced, and generally men with oligospermia have only between 20% and 30% chance of pregnancy. Male oligospermia is mainly affected by the following reasons. If a man has a blockage in the vas deferens, it may cause oligospermia to appear. It may also be due to the failure of the spermatogenic function of the testes, resulting in a decrease in sperm count and sperm viability. Some men who suffer from inflammatory diseases of the genitourinary system may also experience significant oligospermia, such as epididymitis, orchitis, and seminal vesiculitis, which not only reduce the number of sperm, but also affect the quality of sperm, so it can affect normal conception. In addition, high testicular temperature or toxin accumulation can also cause oligospermia in men, which can also affect normal conception. It is true that a small amount of sperm reduces the chance of pregnancy, but it does not mean that there is no probability, it mainly depends on the vitality of the sperm, if the number of sperm is small, but the quality is excellent, there is a possibility of pregnancy. It is recommended to eat more protein-rich and zinc-rich foods.