_:vb50939847 "url:https://www.ncbi.nlm.nih.gov/pubmed/19344877"^^ . _:vb50939847 . _:vb50939847 . _:vb50939847 . _:vb50939847 "A male infertility characterized by autosomal recessive inheritance of impaired or absent sperm motility and increased incidence of morphologically abnormal sperm that has_material_basis_in mutation in the CATSPER1 gene on chromosome 11q13."^^ . _:vb50939847 . _:vb50939847 .