Level 1: Can I get pregnant with low sperm motility? Will low sperm motility affect pregnancy? How to improve sperm motility? Sperm motility refers to the motility and speed of sperm and is one of the important factors affecting male fertility. If sperm motility is too low, it will affect the possibility of pregnancy. Generally speaking, sperm motility below 40% is considered abnormal. So, can you get pregnant with low sperm motility? The answer is yes. Although the sperm count is large and the shape is normal, if it lacks sufficient motility, it will be difficult to succeed.