if you look at the second and third pictures of the first lot posted you can see an egg in them,mainly in the second picture it shows up as a light patch just in front of the rear leg......
They tend to be the same day or night,the only time they darken up is when they are in the hide and I remove the hide from on top of them and then its only a little while until they go back to normal...
Got a picture of the adult marmorata there chrisreptile...Feel free to post one on this thread if you do,lets get some pictures of the different velvets happening...