After 22 days it appears that Oscars eggs are infertile.
After removing 23 of them from the incubator because of their yellow-brown wrinkled appearance, I cut them open to find no trace of embryos, blood vessels, etc.... I still have three in the incubator, but I am sure that the whole lot is infertile.
To make matters that much more complicated, my other female egyptian, Isabella, has just laid 28 eggs.
Do not think any are fertile but we will see....
Ed




