title: Electron microscopic observations on advanced stages of spontaneous polyspermy in rabbit zygotes.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D005260:Female; D005306:Fertilization; D008297:Male; D008854:Microscopy, Electron; D010063:Ovum / Q000166:cytology*; D011817:Rabbits; D013094:Spermatozoa / Q000166:cytology*; D014817:Vitelline Membrane / Q000166:cytology