noun
- early stage embryos consisting of a hollow ball of cells, typically formed about five days after fertilization
Usage: biology; medical
Examples
- The blastocysts were carefully monitored in the laboratory.
- Scientists studied the development of blastocysts in mammals.
- The fertility clinic successfully cultured several blastocysts.
- Blastocysts contain both inner cell mass and outer layer cells.
- Researchers examined how blastocysts implant in the uterine wall.
- The quality of blastocysts affects pregnancy success rates.