Where does fertilisation take place in human beings ? What changes occur in egg cell (ovum) during fertilisation ?

In which stage is blastocoele formed

In indeterminate cleavage the fate of blastomeres is fixed at which of the following stage

Which event is possible when changes in layer of zona pellucida occurs by sperm at fertilizatioi time?

The attachment of the mammalian blastocyst to the uterine wall is