My eggs have been in the incubator for 21 days, I have had two lovely lively chicks hatch and another pipped 16 hours ago without any further progress or signs of movement. I have resisted helping or opening the incubator but spend far too long staring at the eggs. The temp is about 37 and humidity 72%. I have 2 other eggs in there which have not pipped. I am hoping that my chicks are just waiting for the right moment any advice?