title: Difficulties in distinguishing between a mature spermatid and a testicular spermatozoon.
authors.forename: S E
authors.initials: SE
authors.lastname: Lewis
authors.forename: N
authors.initials: N
authors.lastname: McClure
mesh_terms: D002454:Cell Differentiation; D048429:Cell Size; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods; D006801:Humans; D008297:Male; D008845:Microinjections; D013087:Spermatids / Q000166:cytology*; D013094:Spermatozoa / Q000166:cytology*; D013737:Testis / Q000166:cytology*