Semen Analysis Question

Nichole

My husband recently had a semen analysis completed and something on it was very confusing to me. The Motility was rated 40% progressive, but only given a 1 on the motility scale. What does this mean? That 40% of his sperm are moving, but aren't going anywhere? I guess the word "progressive" throws me off as I take that to mean forward. Can anyone shed some light?