Parent concurrent request to wait until all child concurrent programs completes

We are on R12.1.2.

I have a requirement - Keep Parent concurrent request to wait until all child concurrent programs get completed.

Parent program submits multiple child requests (say example 40 requests) in  a loop. So I do not want to check each child concurrent request status and then to submit the next child request.

After the parent program submits all the child requests (exiting the loop), I want to check the child requests status at once and if they are not completed then keep the parent request to wait. Once all child requests are completed, then complete the parent program.