english: Common convention is to transfer the embryo three days after fertilization, when the embryo has eight cells, or on day five, when the embryo is called a blastocyst, and has hundreds of cells.
non_english: Uobičajena procedura je da se prebace embrioni tri dana nakon oplodnje, kada embrion ima osam ćelija, ili petog dana, kada je embrion poznat kao blastocit, i ima stotine ćelija.