That's a HORRIBLE shame, I'm very sorry to hear that she didn't make it.Clearly, something is wrong with the structure of these animals' reproductive tract, or they wouldn't be dying the way they are.
We must always remember that a color or pattern morph is a mutation, and most mutations in nature are detrimental. Only rarely are they beneficial, or neutral. Desert is due to a single mutated gene, and that gene must also control something that is involved with the female reproductive system. (Or, even more likely, the Desert appearance is a side-effect of whatever this gene is actually affecting).