It is difficult to explain the results without graphs but I will try. It was clear that all eggs seem to grow at different rates during their incubation period. By this I mean when you candle your eggs eggs the veins seem to cover the egg at varying rates of coverage. Basically the veins grow fast, then have a much slower period of growt and then speed up so that by 60% of the incubation period the whole of the inside of the egg is covered in veins. Each species has its own growth pattem which will only vary if you tum your eggs in different ways.