Granted, this is just my personal opinion, but figuring out where this is coming from by researching the genetic background of both the mother and the father (which should have been done PRIOR to this breeding, right?) seems like the way to go, NOT just try again and see if you get lucky and can deem the problem fixed.
Say it is the female, and she doesn't produce one with the next litter...you wouldn't know now would you?
I know it sucks when you come to realize that a dog you'd hope would be sound stock just isn't what they need to be....trust me, we recently made a hard decision to spay a female because of this. But IMO, it's the responsible way to go. Surely you understand this having owned and lost a blue before? Why wouldn't you go to any lengths neccessary to keep yourself or someone else from having to go through this again?