Bourkes eggs fertile

I was ready to throw out Rocky and Rosie's eggs only to find that some are actually fertile.  Embryos are only just starting developing despite being laid weeks ago.  I've taken out two definite clear eggs to leave her sitting on 7.  Meanwhile, Pinky and Perky now appear to have 8 eggs....I'm just going to leave them to it.  I've lost track when any of the bourkes' eggs are due to hatch.