title: Ultrastructure of immotile spermatozoa in an infertile male: a spectrum of structural defects.
abstract: A healthy well-androgenized male with no apparent defects of the endocrine system or ciliated epithelium presented with suspected infertility. A detailed electron-microscopic analysis of the semen showed viable but immotile spermatozoa manifesting a complex spectrum of fine-structural defects primarily in the flagella. The complex of deficits that can be appreciated only at the fine-structural level underscores the importance of electron-microscopic analysis in the evaluation of semen samples where the primary defect is a lack of motility.
mesh_terms: D000328:Adult; D006801:Humans; D007248:Infertility, Male / Q000473:pathology*; D008297:Male; D008854:Microscopy, Electron; D013081:Sperm Motility; D013082:Sperm Tail / Q000648:ultrastructure; D013094:Spermatozoa / Q000648:ultrastructure*