How long can a fertilised egg wait before incubation.

[NorthEastGameBirds]

You read different advice all over the internet and hear different advice from friends and fam but I was wondering how long can a fertilised egg sit before going into an incubator?
ive currently got my incubator slot on Sunday and the eggs arrive today. (Apart from 6 which arrived on Tuesday)
What is the LONGEST you have left a fertilised egg and still got results? Thanks backyard chicken crew!

 

[CNJ]

I gathered eggs from my back yard for 10 days and put them all in the incubator at the same time and got good results.
I have a lot of experience with ebay eggs, I found that incubating them up right with the pointy side down and not slanting them side to side for 3 days had better results than my advanced brinsea incubator which rolls them every hour side ways. I hand slanted a cheap good mother incubator side to side three times a day with a book. I used only the bottom tray and a plastic egg carton to hold them upright. I took out the spinning rod, so I can fit 15 eggs.
I think incubating the mail order eggs up right helps settle the egg. Air displacement is the main reason mail order eggs don't hatch.

 

[Nigel27]

They start loosing viability after about ten days depending on the conditions but can stay viable for up to a month or probably more if kept in the perfect conditions

 

[NorthEastGameBirds]

I’ve got 6 Eggs just sat in the garage where it’s nice and cool, I’m just praying the few arriving today don’t get treated like a rugby ball by our wannabe Jonny Wilkinson postie!

 

[CNJ]

I’ve got 6 Eggs just sat in the garage where it’s nice and cool, I’m just praying the few arriving today don’t get treated like a rugby ball by our wannabe Jonny Wilkinson postie!

I like to buy from farms that give our phone number to our local post office for pick up. It minimizes the transportation risk.

 

[spartacus_63]

I routinely hatch 22 day old eggs and have found no loss of viability compared to "fresher" eggs.
I store my hatching eggs in egg cartons with the small end up at around 50° temp. I do not turn them.
Two days prior to setting them in the incubator, I warm them to room temperature (70°). In regard to warming them, I have found that this does not increase the hatch rate, but what it does do is shortens the hatch window. If I take the eggs from cool storage to the incubator, my hatch window (first to last hatch) was up to 48 hrs. If I brought them to room temperature for two days, the hatch window was around 24 hrs.

 

[amyrivera911fire]

I routinely hatch 22 day old eggs and have found no loss of viability compared to "fresher" eggs.
I store my hatching eggs in egg cartons with the small end up at around 50° temp. I do not turn them.
Two days prior to setting them in the incubator, I warm them to room temperature (70°). In regard to warming them, I have found that this does not increase the hatch rate, but what it does do is shortens the hatch window. If I take the eggs from cool storage to the incubator, my hatch window (first to last hatch) was up to 48 hrs. If I brought them to room temperature for two days, the hatch window was around 24 hrs.

You store with the pointy end up not down? Doesn't that displace the air sac? I'm legitimately curious because my daughter had put some I had planned on hatching out in the carton with the pointed end up and I didn't discover it until over a week later when I was getting prepared to incubate...they became eatin eggs because of that.

 

[MysteryChicken]

I've went 2-3 weeks before, & still got good hatch rates. This was with both shipped eggs, & eggs from my flocks.