title: Ultrastructure of a human implantation site.
mesh_terms: D000328:Adult; D002454:Cell Differentiation; D010064:Embryo Implantation; D004717:Endometrium / Q000166:cytology; D005260:Female; D006801:Humans; D007044:Hysterectomy; D008722:Methods; D008854:Microscopy, Electron; D010060:Ovulation; D010063:Ovum; D011247:Pregnancy; D013997:Time Factors; D014327:Trophoblasts / Q000166:cytology*