title: Absence of arms in the axoneme of immobile human spermatozoa.
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations; D006801:Humans; D007248:Infertility, Male / Q000235:genetics; D008297:Male; D013081:Sperm Motility; D013094:Spermatozoa / Q000648:ultrastructure*