What instock said is correct, since DNP enters every cell it will get in eggs, so in theory it could cause damage. This has never been shown, but in good conscience I always bring it up. That being said, I have known many women including female mods that have run DNP several times with no problems, they seem to tolerate it better than men actually.
Now me personally, I wouldn't let my girl run it because she's just lazy and could do other things. If your girl just wants an easy way out then you may want to think about it, I don't mind fucking my own body up but no way in hell I'll let my girl do it. However, if you've tried everything else or her problem is severe and she is willing to take any possible risk to her eggs, it certainly will not harm her to try it.
Regards,
-H-