Are any of your shrimp pulling eggs out of their bottom abdomen with their legs and moving them around under their body? If you are seeing this behavior then you should see shrimp babies within approximately the next 25 days. I’m fairly new to owning shrimp and I am just now seeing the eggs moving around via legs. Their may be other ways of telling but that was the first thing that stuck out to me. It seemed to happen shortly after they all molted, which happened right after the first water change I did with them.