A fertility doctor says he used "Octomom" Nadya Suleman in a human study on fertility methods. Dr Michael Kamrava testified that Suleman volunteered for the study and signed a consent form listing risks of the procedure.
The doctor took the stand after a Food and Drug Administration investigator testified that the mother of 14 children was part of an experiment.
Deputy Attorney General Judith Alvarado repeatedly asserted through questioning that Suleman could not have known that she was a "human guinea pig".
The state medical board is trying to revoke the doctor's medical license, alleging gross negligence in his treatment of Suleman and two other patients.
Kamrava implanted a dozen embryos into Suleman that resulted in her octuplets last year.
(Sapa, Shaya Tayefe Mohajer, November 2010)