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LM of a four-cell embryo showing its blastomeres

LM of a four-cell embryo showing its blastomeres

P680/0490

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Credit

PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY

Caption

Four-cell embryo. Image 3 of 4. Light micrograph of the cells (blastomeres) of a 4-cell human emb- ryo two days after in vitro fertilisation (IVF). In IVF, sperm is introduced to the egg in the laboratory. An envelope (zona pellucida) is seen around the embryo. Cytoplasmic fragments may be left around the cells (inside the zona pellucida) by cell divisions, which decreases the embryo's chances of survival. This embryo has a many fragments (small rounded areas) around it, and will be discarded. See images P680/488-491 for embryos with successi- vely more fragments. Magnification unknown.

Release details

Model release not required. Property release not required.

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