Is she gravid, or are you asking if you should do things to encourage her to produce infertile eggs?
If the former, then definitely provide her a safe and suitable place to lay. Serious health issues can arise when a dragon holds onto her eggs instead of laying them.
If the former, it's better they don't produce infertile eggs if you can manage your luck with it. And it does seem to all pretty much be luck based on whether or not a female dragon will produce infertile eggs.
-Brandon