Day 5 morula

Hi ladies, I had my egg retrieval on Saturday. They ended up retrieving 5 eggs, 4 were fertilized via icsi, and 4 had cleaved by day 2. Today is day 5 and the embryologist just called and said that all 4 of them are still in the morula (early day 4 stage). Has anyone had experience with this?

They are doing a transfer today since they do day 5 transfers but I don't think the success rates are very high with morulas. I know we still have a shot but I was really hoping to at least maybe end up with 1 blastocyst at the end of this cycle. I'm trying to stay positive but it's getting harder and harder.