Gosnell's third wife, Pearl Gosnell, 52, a teenage daughter and an adult son periodically joined McMahon in the booth.
Common Pleas Court Judge Jeffrey P. Minehart carved out the morning from an ongoing murder trial in case a formal hearing was required.
But by about 1 p.m., the shuttling ended and the lawyers left.
It could not be determined if Gosnell rejected a plea offer because of a gag order barring lawyers and principals from commenting on the case.
Cameron and Pescatore and McMahon all declined comment, citing Minehart's gag order.
A last-minute plea deal is not unusual, however, especially in a case like Gosnell's where there is the possibility of a death sentence if the jury finds him guilty of first-degree murder.
Gosnell has been held without bail since January 2011 when he was charged with performing illegal late-term abortions and killing infants born live and viable by snipping their spinal cords with scissors.
He is charged with seven counts of first-degree murder involving the deaths of seven newborns and a count of third-degree murder in the 2007 death of a Virginia woman given too much anesthesia by Gosnell's untrained staff during an abortion.
Nine of Gosnell's employees at his Women's Medical Society Clinic at 3801 Lancaster Ave. - including his wife - were charged along with him for participating in the illegal abortions or being involved in other aspects of what prosecutors called a "corrupt organization."
All but one of the employees has already pleaded guilty to a variety of charges and some are expected to testify against Gosnell at trial. None of those who pleaded guilty has been sentenced.
The only one who will stand trial with Gosnell is Eileen O'Neill, 56, of Phoenixville, a medical school graduate accused of working as a doctor in Gosnell's clinic though she never obtained a medical license.
O'Neill's attorney, James Berardinelli, said she intends to go to trial.
Gosnell also faces trial in federal court on a December 2011 grand jury indictment accusing him of operating a "pill mill" out of the Women's Medical Society where scripts for addictive prescription narcotics were sold for cash.
Contact Joseph A. Slobodzian at 215-854-2985, email@example.com, or @joeslobo on Twitter.