I just had been through the eggtopsy of some of them. I got some un-fertile and some early quitter. Though, one was completely developed

. I guess he's fine till 21st cuz I can see it's beak, legs everything fully developed. I guess something went wrong with the humidity. I didn't read it before that door should be completely locked till most of the batch is hatched. We opened the door quite many times after the first couple of hatches. I then read it here that opening often may cause low humidity and hence causing other due hatch eggs become dead

. IDK, may be that was sheer luck.