good eggs or bad eggs?

OK, I know that frogs amplex and as the female lays her eggs, the male fertiles them at that time. But if that's the case then I guess my eggs aren't any good.... I had a pair of african clawed frogs together and they were amplexing constantly. Then the male escaped from their enclosure, not to be found. Now, yesterday, my female laid eggs... I have never seen fertile frog eggs before so I don't know what they look like, but these are white and seem to have like a nucleius in them... My question is.. Is there any possible way for a female frog to retain sperm so that these eggs would be fertile?

No, to retain sperm they'd have to have internal fertilization, only one anuran (frogs and toads) have this, the tailed frog of the rocky mountains. If a male isn't present to fertilize the eggs, no way they are fertile.