KCNU1 and Abnormal sperm morphology: In this study CatSper1, 2, 3, 4, KCNU1, Hv1, and TMEM16 ion channel expressions were studied in infertile men with oligoasthenospermia, isolated asthenozoospermia, teratozoospermia, and oligozoospermia in comparison with fertile individuals with normal sperm parameters.