Bobbi Kristina Brown: Initial Autopsy Completed, Shows No Significant Injuries

— -- The initial portion of the autopsy for Bobbi Kristina Brown, the daughter of singing icon Whitney Houston and R&B star Bobby Brown, has been completed and showed no significant injuries.

Brown, 22, died on Sunday after being in medical care since she was found unresponsive in her Georgia home on Jan. 31. The circumstances of the incident are still under investigation, according to the Fulton County district attorney.

The autopsy did not reveal any obvious cause of death and additional laboratory testing will be performed by the Fulton County Medical Examiner.

A death certificate will not be issued and cause of death not determined until all the tests are completed and "all investigative, medical, and other documentary records are received and thoroughly reviewed," the medical examiner stated through a press release.

This is expected to take "several weeks," the release adds.

In an earlier statement, the medical examiner addressed the time between Brown being found unresponsive in her home and her death and how that will factor into the autopsy report.

"The time which has elapsed between the initial event on January 31st and her resulting death will complicate reconstruction of the events surrounding her initial unresponsiveness. Interpretation of autopsy findings and other information will also be challenging. However, an autopsy could be helpful to address questions which may arise about the cause of her unresponsiveness and eventual death," the statement said.

It continued, "The Roswell Police Department continues its investigation into the circumstances preceding and surrounding the time of the original incident leading to her death."

Brown was taken to a local hospital after she was found face down in her bathtub at the end of January by a friend and her partner Nick Gordon. She was later moved to the Neurology Intensive Care Unit of Emory University Hospital a few days later, and then to a rehab facility in late March. Then in June, her aunt Pat Houston said Brown was moved to hospice care after her condition worsened.

The move to hospice came months after Brown's grandmother Cissy Houston revealed to People magazine that Bobbi Kristina had "global and irreversible brain damage."

On Sunday, the Houston family released a statement on the aspiring singer and actress's passing.

"She is finally at peace in the arms of God. We want to again thank everyone for their tremendous amount of love and support during these last few months," a statement from the Houston family said.

Today, Brown's father spoke out about losing his daughter, saying he is "completely numb."

"Krissy was and is an angel," Brown said in a statement to ABC News. "My family must find a way to live with her in spirit and honor her memory. Our loss is unimaginable. We thank everyone for the prayers for Krissy and our family as we mourn my baby girl."

Bobby Brown's attorney, Christopher Brown, added, "Krissy fought to get well for months, however she has succumb to her injuries.”