(CNN) Two doctors who led care for a woman who gave birth after being sexually assaulted at an Arizona health care facility are no longer treating its patients, Hacienda HealthCare said Monday.

One of the unidentified physicians resigned, and the other has been suspended, Hacienda said.

Caretakers of the woman were taken by surprise by the December 29 birth, with one telling a 911 dispatcher, "We had no idea she was pregnant." The woman is a member of the San Carlos Apache Tribe and has long been in a vegetative state, the tribe's chairman has said.

Phoenix police recently said they are conducting a sexual assault investigation and were gathering DNA from men who work at the facility. The woman, 29, has been there since 1992.

The birth has prompted Hacienda to hire a former prosecutor to review what happened. The company is turning over all records of the woman's treatment and has been ordered to hire a third-party manager to oversee several of its facilities.

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