Blastocyst

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An embryo that is approximately five days old and consists of some 100 cells that form an outer shell of cells protecting an attached inner group of cells surrounding a fluid core. The outer cells develop into the placenta, which protects the fetus created from the inner cells.

By | 2015-08-10T18:40:11+00:00 August 10th, 2015|Comments Off on Blastocyst

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