title: Ultrastructure of a seven-cell human embryo.
mesh_terms: D001755:Blastocyst / Q000648:ultrastructure; D002455:Cell Division; D002467:Cell Nucleus / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D004622:Embryo, Mammalian / Q000648:ultrastructure*; D047108:Embryonic Development; D005260:Female; D006801:Humans; D009940:Organoids / Q000648:ultrastructure; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D015053:Zygote / Q000648:ultrastructure*