MuscovyMad - are you hatching just one egg?
I am hatching 6 eggs. I have my chickens on someone elses land and can't keep too many. I went up one day and found an egg that had just been laid an was planning on just having it for lunch. However on the drive home my friend warmed it up in her hands and so i thought that meant it had kick started it's growth again so i felt like i had to incubate it. So we chucked it in the bator. Then over the next week i collected more eggs from her. (The only one laying at the time). And i got 6 more so i put them exactly one week later.
So its not time for that first chick to hatch. It's been through quite an ordeal. I.e it was incubating at my friends house but she couldn't cope with the 3 x daily turning so i took it back to mine which is a half hour drive away. And i didn't want it to cool down so i taped it to my stomach to keep it warm. I candled a few days later and the embryo was floating about so it survived the journey. Then after being in the bator for a few days i had to move the bator up the stairs to hide it from my sister who was visiting to keep it a surprise. And i have had to move the bator 2 x now. But hopefully through all this it will survive.
Today at 5pm was the start of day 21 so we are currently 6 hours in and there is no sign of life. I have the egg sitting in a cardboard ring to keep it from rolling about the place because i was worried about it drowning and i heard that if you keep them in place then they can hatch easier as each peck doesn't result in them flying across the bator but instead all the force goes into the shell therefore not using up as much energy. Also i figured it might make hatching easier as i suspect the shells are quite thick. I am tempted to remove it from the ring to see if it is moving. I don't have a lockdown as i have had to open the bator 3x daily to turn the other eggs.
However at the end of the day there is still 18 hours left of day 21 plus it could hatch later. I'm jus miffed cause i got excited for a day 18 hatch as i heard it was quite common in bantams. So it feels like i have been waiting forever.
At the end of the day if it doesn't make it i have 5 more due in a weeks time. Plus 3 fertile eggs a day so it's not like it is my only shot.
Sorry for hijacking with a life story. It's just answering a question in a long way.
P.s congrats on your hatch. Hope the rest come out soon.