Are my Dynastes tityus eggs fertile?

[mantisfan101]

Is there any way to tell if D. tityus eggs are fertile WITHOUT waiting for them to hatch? I have 7 eggs and they seem 3/4 or 2/3 creamy yellow, while the remaining 1/4 or 1/3 is transulcent yellow cream. The eggs were all found either scattered deep in the substrate or in little "brood balls" in the substrate. 

 

[Redmont]

Are the eggs getting bigger? I think they turn more yellow as they get older, and they get larger as well

 

[moldveien]

The eggs the female lay later in her ovidipotition will be more yellow they have a lower hatchrate then white ones but most should hatch White eggs of most specis are 85-90% while yellow eggs are 75-80% in my expirience anyway