precompaction 8-cell embryos were most susceptible to the action of these sterols and failed to compact ( as assessed by cell flattening and increased intercellular adhesion ) but continued to divide , whilst later stage embryos developed normally , 7-ketocholesterol had a specific effect on the ultrastructure of the smooth endoplasmic reticulum of treated embryos .
C0007634
cell
C0230789
smooth endoplasmic reticulum