RESUMO
<p><b>OBJECTIVE</b>To study the semen quality of male infertility patients in Suzhou area, China.</p><p><b>METHODS</b>We detected the semen quality of 2 640 infertility patients in Suzhou area using computer-assisted semen analysis technology.</p><p><b>RESULTS</b>Of the 2 640 semen samples, 27.35% were found normal in all seminal indexes, 47.35% (1 250/2 640) abnormal in the percentage of grade a + b sperm, and 42.39% (1 119/2 640) abnormal in sperm motility. The percentage of grade a + b sperm and sperm motility were decreased with the increase of age, more obviously in those over 40 years. The incidences of asthenospermia and oligospermia were 37.31% (985/2 640) and 8.94% (236/2 640), rising with the increase of age, especially in those older than 30 years. The 9 sperm motion parameters, including VSL, VCL, LIN, MAD, VAP, STR, WOB, ALH and BCF, were significantly reduced with the decrease of sperm motility and sperm concentration.</p><p><b>CONCLUSION</b>The infertile men in Suzhou area are mainly characterized by a decrease in sperm motility, especially in the percentage of grade a + b sperm. The correlation of age with sperm motility and incidence of asthenospermia and oligospermia suggests that men also have an appropriate childbearing age.</p>