7 day human embryo (IMAGE) Babraham Institute Caption Microscopy image of a human embryo 7 days after fertilisation. Nuclei are shown in blue, and the shape of each cell is outlined in green. Credit Dr Matteo Molè (Babraham Institute) Usage Restrictions Must give credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.