Question

what are the clusters of cells that gets attached to the uterine wall during foetal development​

Answer 1

The zygote will spend several days making its way down the fallopian tube. During this time, it develops into a morula, a ball of 12–15 cells. As time goes on, it will become a bigger collection of cells called a blastocyst. At week 4, the blastocyst implants into the wall of the uterus.

Answer 2

Explanation:

blastocyst are the cluster of cells that are attached to uterine wall in mother ,

during this stage there are only 100- 150 cells constituted in it , and Starts to divide further for foetus development .