First off thank you all for your help in advance. I am incubating eggs for the first time and am very excited. I want to be as successful as possible. I have been preparing my incubator for the eggs and have done temperature test on it. I am trying to keep it at roughly 100 F. I noticed that when the heating element either goes on of off, there is a couple of degrees in change either direction. For example, when the element kicks on it brings the incubator up to 100 F and kicks off, however, the temperature inside the incubator, according to the thermometer, rises two more degrees (102 F) before it starts to cool. Once it cools to just below 100 F the incubator kicks on, but the temperature will drop to 97.8 before it starts to heat up again. My question is as follows: Since the average temperature is 100 F, will this fluctuation have an impact on hatchability? The temperature is not higher or lower than 100 F for longer than 1 minute.