When you have a low sperm count, less sperm than normal are present in the fluid (semen) that is released during an orgasmic experience. Oligospermia is another name for a low sperm count A zero sperm count is referred to as azoospermia. You have a low sperm count if there are less than 15 million sperm per milliliter of semen. The likelihood that one of your sperm will fertilize your partner's egg and cause pregnancy is decreased if you have a low sperm count. Nonetheless, a lot of guys with low sperm counts can still become a parent.