That's a great article !!! To be honest it looks all the same from day 13 on so it's hard to tell I'm thinking I was maybe a week off so it could be this weekend. I do see veins the air sack. And most of the pointy part of 3 eggs are really dark. I could see any movement in any of them so I guess I'll have to just sit and wait. I keep checking her to listen if there is any peeping. I even put the egg to my ear to listen for noise or peeping but I heard nothing. I'm just really anxious and excited I guess.