Round spermatid nucleus injection (ROSNI).
D002467:Cell Nucleus; D048429:Cell Size; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D007267:Injections; D008297:Male; D009865:Oocytes; D013087:Spermatids / Q000166:cytology* / Q000648:ultrastructure