Who paid for the in-vitro?

With all of the current coverage given to the birth of octuplets to Nadya Suleman, I've found one very important piece of evidence to be lacking - who paid for the in-vitro fertilization in the first place. The articles describe her disability and settlements and the fact that she is living with her parents, but truth is, she's already undergone several previous in-vitro treatments, which are costly and have to have eaten through any settlements she has received. Surely in-vitro fertilization isn't covered by any form of public assistance, and one would not think that a fertility clinic would proffer credit to anyone in her circumstances for the procedure. In my mind, the options seem to be this: Either her parents paid for the procedure and are now lambasting her for the results, or else this was done as a bizarre publicity stunt by the clinic. Has anyone read anything about how Suleman's fertility treatments were financed? What is your opinion?