+A blastocyst is an early-stage [embryo](/wiki/embryo), a hollow sphere of cells formed days after fertilization. This delicate structure holds the potential for life, poised for [implantation](/wiki/implantation) into the uterine wall.
+## See also
+- [Morula](/wiki/morula)
+- [Fertilization](/wiki/fertilization)
+- [Gastrulation](/wiki/gastrulation)