Police have not named her, but the Chronicle understands it is Sharon Taylor, known to some as Shaz, who died on November 1.
They said the exhumation was "as part of an ongoing investigation by South Yorkshire Police on behalf of the coroner.
"Following the exhumation a forensic post mortem will be carried out."
Police said a post mortem was inconclusive and the Chronicle understands a toxicology report done for the post mortem showed no signs she had drink or drugs in her system.
A source said she had been to work as normal the previous day but was found dead at home in Dodworth in the early hours.
Full story in this week's Chronicle.