Persisting human blastocysts. A preliminary report.
D003475:Curettage; D010064:Embryo Implantation; D004717:Endometrium / Q000502:physiology; D005260:Female; D006650:Histocompatibility Testing; D006801:Humans; D010063:Ovum / Q000254:growth & development*; D011247:Pregnancy; D013194:Staining and Labeling