You need to put on a pair of gloves and a coat and go and get any eggs from under her. You do not have to remove her---just slide your gloved hand under her enough to pick up her front and tilt her backwards then with the other hand get all eggs. If you want her to set---Then I would take another fresh egg and leave under her for the night. (Start collecting fresh fertile eggs)Tomorrow I would remove that egg and any others and then put another fresh egg under her-----the next day if she is still setting---remove all the eggs from under her and set her with fresh "MARKED" eggs---mark your calender. Each DAY take them gloves/coat and lift her front and remove any eggs that are not marked. After about 2 days "I" move all my broody hens--nest and all to a private pen(you do not have to do this, but it makes things better and you do not have to look under her anymore for eggs the other hens layed in her nest), which has enough room for her to get off the nest to stretch her legs, eat, drink etc. Do not put food or water close to her nest where she can eat without getting off the nest. Good Luck!
Thanks for the info. I really liked the way you explained the process. I had hoped to have a broody in the spring and I have been reading this thread for a while. But when it comes right down to it everything seems complicated. I have six nest boxes but they are in a set, all attached. The one she is in is about 12-15 inches off the ground. I had wanted to put a broody in a dog crate, in the coop, but this particular pullet is kind of cranky. I will have to put the straw she is sitting on in some kind of box then at some point move her and the box to the crate I have read to do it at night would be best. Or I could just try to fence off an area of the coop but I thought she might feel more secure in the dog crate. The logistics just seems complicated. I guess I could leave her where she is and move her after the hatch because the babies could not get back in the box after they get out. I would really like to raise them with the flock. I know there are different views but I don't think the others will give Anastasia any trouble. I wouldn't say she is top on the pecking order but nobody really messes with her. I have never been able to reach under her when she is on the nest like I can the others. She is a Wyandotte and I have barred rocks(kind of bossy)and cream legbars( kind of timid) and some mixed(also timid). She is the only Wyandotte I have except the roo.