How long are fertile eggs still good after they are laid?

[HHandbasket]

There is a possibility (not a huge one, but a possibility) that I could be getting some mille fleur bantam cochin hatching eggs this weekend. Thing is, we already have a hatch cooking in the bator that is set to hatch on Valentine's Day or the day before. That would mean holding onto the cochin eggs for approximately 2+ weeks before I could put them in the bator.

Will they still be good to go in two weeks? Is there an ambient room temp at which they do best if I have to wait a couple of weeks to incubate them?

Thanks in advance for your kind responses.

 

[Mahonri]

Fertility goes down steadily after 7 days.

 

[Gypsy07]

Is your bator full at the moment? If not you could just put them in there with your first eggs and try a staggered hatch. I'd imagine your chances of hatching them out would be at least as good as if you stored them for 2+ weeks.

 

[Zac's Flock]

I would agree with what Gypsy said - the cochin eggs might be less likely to hatch due to the fact that the humidity (and temp??) is increased for lockdown but it might do the same damage as it would waiting the 2 weeks.