DNAH5 and Reduced sperm motility: 90% of men with primary ciliary dyskinesia (PCD) or Kartagener syndrome accompanied by asthenozoospermia, the majority of them presenting dynein genes mutation.[3,4] To date, Zuccarello et al[5] screened 90 patients with isolated nonsyndromic asthenozoospermia for mutations in DNAH5 and other genes.