In a shocking accusation, the attorney presenting the case against Octo-Mom Nadya Suleman's fertility doctor claimed that the mother of 14 did not know she was part of an experimental study, RadarOnline.com has learned.

PHOTOS: Octo-Mom At The Beach

Deputy Atty. Gen. Judith Alvarado said Suleman had unknowingly been used as a "human guinea pig" by Dr. Michael Kamrava.

He took the stand on Thursday and testified that Suleman had volunteered for a study that used an experimental embryo implantation technique cited by federal regulators.

PHOTOS: Octo-Mom And All 14 Kids At Millions Of Milkshakes