Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.

Last updated: Sep 17th, 2024

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A trophoblast is a cell which comes together with other trophoblasts to form a blastocyst's outer layer. This will supply the embryo with nutrients and will eventually become a large part of the placenta. Trophoblasts are created in the first stage of pregnancy, within the first three days; they're the first cells which differentiate from a fertilized egg.

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