title: Studies on the mechanism of nidation. XXVII. Sperm-derived inclusions in the rat blastocyst.
mesh_terms: D000818:Animals; D010064:Embryo Implantation; D004717:Endometrium / Q000276:immunology; D005260:Female; D008297:Male; D008854:Microscopy, Electron; D010063:Ovum; D051381:Rats; D013094:Spermatozoa; D014327:Trophoblasts