The normal range of a healthy man's sperm is 35 to 200 million per millilitre of sperm. If you have none or lower amount of sperm, you may have trouble conceiving. Poor sperm quality are also one of the common causes of infertility, which includes sperms that are not developed properly and sperms that are neither fast or agile fast.

More than 90% of male infertility are caused by poor sperm quality, low sperm counts, or both. The remaining cases of male infertility can be caused by a number of factors including failure to ejaculate, anatomical problems, hormonal imbalances, blocked vas deferens, and testicular failure.

Some men suffer from retrograde ejaculation, where the semen goes backwards into the bladder during sex rather than into the vagina. In some cases, the tubes that transport sperm from the testicles to the seminal vesicles can be blocked due to an infection or a defect.