Sometimes I help them. 2 days I would be helping them. It is tricky. I take an egg out and put on glasses and put it under a light. Using a tweezer, I pick away the shell from the outer areas of the pip.... and I try to go in the direction the chick would have/should have. You have to be very very gentle and careful. Some of the people on here are much more expert than I am. Along this track, you might find the blood vessel. In that case, I would reverse direction and try to zip the other way until all the way around and let the chick get out itself when possible. It has an umbilicus attached to the membrane inside the egg and you do not want to pull or damage any of that.... I would work in the same way the chick would.... zipping around the top.