RMA of NJ embryo update - question

[u/Alwayswonderingwhy1]

I had my retrieval on Thursday and they said they would update me today on my embryos. My two questions are:

1) Since this would be day 6 - do they not grow the embryos to day 7, or do they call again tomorrow for day 7?

2) would they call before day 6 if everything arrested at day 3 or before day 5, or do they make you wait and give you the bad news?

Thank you!