blastocyte
/ˈblæstəˌsaɪt/
noun
- An early stage in the development of an embryo, consisting of a ball of cells that has not yet implanted in the uterus.
- Scientists study the blastocyte to understand early human development.
- A healthy blastocyte is essential for successful implantation in the womb.
- The blastocyte forms about five days after fertilization.