Just a few weeks ago we did the Baby M case in my Contracts course. One of my students calls my attention this interesting story about a woman who changed her mind after contracting to serve as a surrogate.
If Florida law is as represented in the story, then seems like she has a pretty easy case. The law seems preety clear on this so it isn't quite clear to me why the parents would have contracted with her to use her own egg instead of a donor though, given the potential for this to occur. On the other hand, my guess is that that would have been more expensive and more complicated and that the risk of the surrogate changing her mind was minimal.
Having won on that issue it takes some gumption for the surrogate to then turn around and ask for child support from the father!