If you store it correctly you should be able to hold it up to about 10 days after that from what I read chances of hatch start going down. You can try googling "how to store an egg before incubation". might net you some results on the correct way. I've looked it up before but don't remember how and don't want to ruin your egg by giving bad advice.How long can you wait on a fertile egg before starting incubation? I have one silkie egg that I'd like to try and hatch IF I get some eggs from the bigger ladies. This is the egg I got on the 25th. I'm going away next weekend and didn't want to start the incubator until after I come home, so that Monday. that egg should be fine right if I get others by then right? It'll be 11 days by then since it was laid.