Usually once they have taken the cal glu it's an overnight work. But that is because it has been given in the afternoon. @Aunt Angus had to give one of her ducks many doses before she finally laid. Hopefully you won't have to do this but you might want to give her another dose if she hasn't laid it by afternoon. Can you slip a finger inside and see if you can move the egg around so it's going in the right direction?