Just depends. Some hatch fast and some seem to take forever.
I have only one egg still peeping and nothing from the others. I candled the real quick and ended up pulling on efrom my bantam that didn't seem to have quit before, but it did early. Not sure how I missed that. There's a dark on I can't see anything through, but I have a feeling it's clear because it just feels like it to me. Most of this hatch was shipped eggs and only got 3 to lockdown.
One of mine has a wavy aircell. Usually those don't make it although I have had some that did, so I'll leave that one in there. I think the aircells were so damaged I'm lucky if I get one to hatch. Not that I don't have close to 200 eggs going right now, so I won't be to short of birds. LOL